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| a FEATURES PERFORMANCE 19 ns Instruction Cycle Time @ 3.3 Volts, 52 MIPS Sustained Performance Single-Cycle Instruction Execution Single-Cycle Context Switch 3-Bus Architecture Allows Dual Operand Fetches in Every Instruction Cycle Multifunction Instructions Power-Down Mode Featuring Low CMOS Standby Power Dissipation with 400 Cycle Recovery from Power-Down Condition Low Power Dissipation in Idle Mode INTEGRATION ADSP-2100 Family Code Compatible, with Instruction Set Extensions 160K Bytes of On-Chip RAM, Configured as 32K Words Program Memory RAM and 32K Words Data Memory RAM Dual Purpose Program Memory for Instruction and Data Storage Independent ALU, Multiplier/Accumulator and Barrel Shifter Computational Units Two Independent Data Address Generators Powerful Program Sequencer Provides Zero Overhead Looping Conditional Instruction Execution Programmable 16-Bit Interval Timer with Prescaler 100-Lead TQFP SYSTEM INTERFACE 16-Bit Internal DMA Port for High Speed Access to On-Chip Memory (Mode Selectable) 4 MByte Memory Interface for Storage of Data Tables and Program Overlays (Mode Selectable) 8-Bit DMA to Byte Memory for Transparent Program and Data Memory Transfers (Mode Selectable) I/O Memory Interface with 2048 Locations Supports Parallel Peripherals (Mode Selectable) Programmable Memory Strobe and Separate I/O Memory Space Permits "Glueless" System Design Programmable Wait State Generation Two Double-Buffered Serial Ports with Companding Hardware and Automatic Data Buffering Automatic Booting of On-Chip Program Memory from Byte-Wide External Memory, e.g., EPROM, or Through Internal DMA Port Six External Interrupts 13 Programmable Flag Pins Provide Flexible System Signaling UART Emulation through Software SPORT Reconfiguration ICE-PortTM Emulator Interface Supports Debugging in Final Systems ICE-Port is a trademark of Analog Devices, Inc. DATA ADDRESS GENERATORS DAG 1 DAG 2 PROGRAM SEQUENCER DSP Microcomputer ADSP-2187L FUNCTIONAL BLOCK DIAGRAM POWER-DOWN CONTROL MEMORY 32K 24 PM 32K 16 DM PROGRAMMABLE I/O AND FLAGS FULL MEMORY MODE EXTERNAL ADDRESS BUS EXTERNAL DATA BUS BYTE DMA CONTROLLER ( 8K 24 OVERLAY 1 8K 24 OVERLAY 2 )( 8K 16 OVERLAY 1 8K 16 OVERLAY 2 ) PROGRAM MEMORY ADDRESS DATA MEMORY ADDRESS PROGRAM MEMORY DATA OR DATA MEMORY DATA EXTERNAL DATA BUS ARITHMETIC UNITS ALU MAC SHIFTER SERIAL PORTS SPORT 0 SPORT 1 TIMER INTERNAL DMA PORT HOST MODE ADSP-2100 BASE ARCHITECTURE GENERAL NOTE This data sheet represents specifications for the ADSP-2187L 3.3 V processor. GENERAL DESCRIPTION The ADSP-2187L is a single-chip microcomputer optimized for digital signal processing (DSP) and other high speed numeric processing applications. The ADSP-2187L combines the ADSP-2100 family base architecture (three computational units, data address generators and a program sequencer) with two serial ports, a 16-bit internal DMA port, a byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities and on-chip program and data memory. The ADSP-2187L integrates 160K bytes of on-chip memory configured as 32K words (24-bit) of program RAM, and 32K words (16-bit) of data RAM. Power-down circuitry is also provided to meet the low power needs of battery operated portable equipment. The ADSP-2187L is available in 100-lead TQFP package. In addition, the ADSP-2187L supports new instructions, which include bit manipulations--bit set, bit clear, bit toggle, bit test-- new ALU constants, new multiplication instruction (x squared), biased rounding, result free ALU operations, I/O memory transfers and global interrupt masking, for increased flexibility. Fabricated in a high speed, low power, CMOS process, the ADSP-2187L operates with a 19 ns instruction cycle time. Every instruction can execute in a single processor cycle. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 (c) Analog Devices, Inc., 1998 ADSP-2187L The ADSP-2187L's flexible architecture and comprehensive instruction set allow the processor to perform multiple operations in parallel. In one processor cycle the ADSP-2187L can: * Generate the next program address * Fetch the next instruction * Perform one or two data moves * Update one or two data address pointers * Perform a computational operation This takes place while the processor continues to: * Receive and transmit data through the two serial ports * Receive and/or transmit data through the internal DMA port * Receive and/or transmit data through the byte DMA port * Decrement timer DEVELOPMENT SYSTEM * * * * * Registers and memory values can be examined and altered PC upload and download functions Instruction-level emulation of program booting and execution Complete assembly and disassembly of instructions C source-level debugging See "Designing An EZ-ICE-Compatible Target System" in the ADSP-2100 Family EZ-Tools Manual (ADSP-2181 sections) as well as the Designing an EZ-ICE Compatible System section of this data sheet for the exact specifications of the EZ-ICE target board connector. Additional Information The ADSP-2100 Family Development Software, a complete set of tools for software and hardware system development, supports the ADSP-2187L. The System Builder provides a high level method for defining the architecture of systems under development. The Assembler has an algebraic syntax that is easy to program and debug. The Linker combines object files into an executable file. The Simulator provides an interactive instruction-level simulation with a reconfigurable user interface to display different portions of the hardware environment. A PROM Splitter generates PROM programmer compatible files. The C Compiler, based on the Free Software Foundation's GNU C Compiler, generates ADSP-2187L assembly source code. The source code debugger allows programs to be corrected in the C environment. The Runtime Library includes over 100 ANSI-standard mathematical and DSP-specific functions. The EZ-KIT Lite is a hardware/software kit offering a complete development environment for the entire ADSP-21xx family: an ADSP-218x based evaluation board with PC monitor software plus Assembler, Linker, Simulator, and PROM Splitter software. The ADSP-218x EZ-KIT Lite is a low cost, easy to use hardware platform on which you can quickly get started with your DSP software design. The EZ-KIT Lite includes the following features: * 33 MHz ADSP-218x * Full 16-bit Stereo Audio I/O with AD1847 SoundPort(R) Codec * RS-232 Interface to PC with Windows 3.1 Control Software * EZ-ICE(R) Connector for Emulator Control * DSP Demo Programs The ADSP-218x EZ-ICE Emulator aids in the hardware debugging of ADSP-2187L system. The emulator consists of hardware, host computer resident software and the target board connector. The ADSP-2187L integrates on-chip emulation support with a 14-pin ICE-Port interface. This interface provides a simpler target board connection requiring fewer mechanical clearance considerations than other ADSP-2100 Family EZ-ICEs. The ADSP-2187L device need not be removed from the target system when using the EZ-ICE, nor are any adapters needed. Due to the small footprint of the EZ-ICE connector, emulation can be supported in final board designs. The EZ-ICE performs a full range of functions, including: * In-target operation * Up to 20 breakpoints * Single-step or full-speed operation EZ-ICE and SoundPort are registered trademarks of Analog Devices, Inc. This data sheet provides a general overview of ADSP-2187L functionality. For additional information on the architecture and instruction set of the processor, see the ADSP-2100 Family User's Manual, Third Edition. For more information about the development tools, refer to the ADSP-2100 Family Development Tools Data Sheet. ARCHITECTURE OVERVIEW The ADSP-2187L instruction set provides flexible data moves and multifunction (one or two data moves with a computation) instructions. Every instruction can be executed in a single processor cycle. The ADSP-2187L assembly language uses an algebraic syntax for ease of coding and readability. A comprehensive set of development tools supports program development. POWER-DOWN CONTROL DATA ADDRESS GENERATORS DAG 1 DAG 2 MEMORY PROGRAM SEQUENCER 32K 24 PM 32K 16 DM PROGRAMMABLE I/O AND FLAGS FULL MEMORY MODE EXTERNAL ADDRESS BUS EXTERNAL DATA BUS BYTE DMA CONTROLLER ( 8K 24 OVERLAY 1 8K 24 OVERLAY 2 )( 8K 16 OVERLAY 1 8K 16 OVERLAY 2 ) PROGRAM MEMORY ADDRESS DATA MEMORY ADDRESS PROGRAM MEMORY DATA OR DATA MEMORY DATA EXTERNAL DATA BUS ARITHMETIC UNITS ALU MAC SHIFTER SERIAL PORTS SPORT 0 SPORT 1 TIMER INTERNAL DMA PORT HOST MODE ADSP-2100 BASE ARCHITECTURE Figure 1. Functional Block Diagram Figure 1 is an overall block diagram of the ADSP-2187L. The processor contains three independent computational units: the ALU, the multiplier/accumulator (MAC) and the shifter. The computational units process 16-bit data directly and have provisions to support multiprecision computations. The ALU performs a standard set of arithmetic and logic operations; division primitives are also supported. The MAC performs single-cycle multiply, multiply/add and multiply/subtract operations with 40 bits of accumulation. The shifter performs logical and arithmetic shifts, normalization, denormalization and derive exponent operations. The shifter can be used to efficiently implement numeric format control including multiword and block floating-point representations. The internal result (R) bus connects the computational units so that the output of any unit may be the input of any unit on the next cycle. -2- REV. 0 ADSP-2187L A powerful program sequencer and two dedicated data address generators ensure efficient delivery of operands to these computational units. The sequencer supports conditional jumps, subroutine calls and returns in a single cycle. With internal loop counters and loop stacks, the ADSP-2187L executes looped code with zero overhead; no explicit jump instructions are required to maintain loops. Two data address generators (DAGs) provide addresses for simultaneous dual operand fetches (from data memory and program memory). Each DAG maintains and updates four address pointers. Whenever the pointer is used to access data (indirect addressing), it is post-modified by the value of one of four possible modify registers. A length value may be associated with each pointer to implement automatic modulo addressing for circular buffers. Efficient data transfer is achieved with the use of five internal buses: * Program Memory Address (PMA) Bus * Program Memory Data (PMD) Bus * Data Memory Address (DMA) Bus * Data Memory Data (DMD) Bus * Result (R) Bus The two address buses (PMA and DMA) share a single external address bus, allowing memory to be expanded off-chip, and the two data buses (PMD and DMD) share a single external data bus. Byte memory space and I/O memory space also share the external buses. Program memory can store both instructions and data, permitting the ADSP-2187L to fetch two operands in a single cycle, one from program memory and one from data memory. The ADSP-2187L can fetch an operand from program memory and the next instruction in the same cycle. In lieu of the address and data bus for external memory connection, the ADSP-2187L may be configured for 16-bit Internal DMA port (IDMA port) connection to external systems. The IDMA port is made up of 16 data/address pins and five control pins. The IDMA port provides transparent, direct access to the DSPs on-chip program and data RAM. An interface to low cost byte-wide memory is provided by the Byte DMA port (BDMA port). The BDMA port is bidirectional and can directly address up to four megabytes of external RAM or ROM for off-chip storage of program overlays or data tables. The byte memory and I/O memory space interface supports slow memories and I/O memory-mapped peripherals with programmable wait state generation. External devices can gain control of external buses with bus request/grant signals (BR, BGH, and BG). One execution mode (Go Mode) allows the ADSP-2187L to continue running from on-chip memory. Normal execution mode requires the processor to halt while buses are granted. The ADSP-2187L can respond to eleven interrupts. There can be up to six external interrupts (one edge-sensitive, two levelsensitive and three configurable) and seven internal interrupts generated by the timer, the serial ports (SPORTs), the Byte DMA port and the power-down circuitry. There is also a master RESET signal. The two serial ports provide a complete synchronous serial interface with optional companding in hardware and a wide variety of framed or frameless data transmit and receive modes of operation. Each port can generate an internal programmable serial clock or accept an external serial clock. REV. 0 -3- The ADSP-2187L provides up to 13 general-purpose flag pins. The data input and output pins on SPORT1 can be alternatively configured as an input flag and an output flag. In addition, there are eight flags that are programmable as inputs or outputs and three flags that are always outputs. A programmable interval timer generates periodic interrupts. A 16-bit count register (TCOUNT) is decremented every n processor cycle, where n is a scaling value stored in an 8-bit register (TSCALE). When the value of the count register reaches zero, an interrupt is generated and the count register is reloaded from a 16-bit period register (TPERIOD). Serial Ports The ADSP-2187L incorporates two complete synchronous serial ports (SPORT0 and SPORT1) for serial communications and multiprocessor communication. Here is a brief list of the capabilities of the ADSP-2187L SPORTs. For additional information on Serial Ports, refer to the ADSP-2100 Family User's Manual, Third Edition. * SPORTs are bidirectional and have a separate, doublebuffered transmit and receive section. * SPORTs can use an external serial clock or generate their own serial clock internally. * SPORTs have independent framing for the receive and transmit sections. Sections run in a frameless mode or with frame synchronization signals internally or externally generated. Frame sync signals are active high or inverted, with either of two pulsewidths and timings. * SPORTs support serial data word lengths from 3 to 16 bits and provide optional A-law and -law companding according to CCITT recommendation G.711. * SPORT receive and transmit sections can generate unique interrupts on completing a data word transfer. * SPORTs can receive and transmit an entire circular buffer of data with only one overhead cycle per data word. An interrupt is generated after a data buffer transfer. * SPORT0 has a multichannel interface to selectively receive and transmit a 24- or 32-word, time-division multiplexed, serial bitstream. * SPORT1 can be configured to have two external interrupts (IRQ0 and IRQ1) and the Flag In and Flag Out signals. The internally generated serial clock may still be used in this configuration. PIN DESCRIPTIONS The ADSP-2187L will be available in a 100-lead TQFP package. In order to maintain maximum functionality and reduce package size and pin count, some serial port, programmable flag, interrupt and external bus pins have dual, multiplexed functionality. The external bus pins are configured during RESET only, while serial port pins are software configurable during program execution. Flag and interrupt functionality is retained concurrently on multiplexed pins. In cases where pin functionality is reconfigurable, the default state is shown in plain text; alternate functionality is shown in italics. See CommonMode Pin Descriptions. ADSP-2187L Common-Mode Pin Descriptions Pin Name(s) RESET BR BG BGH DMS PMS IOMS BMS CMS RD WR IRQ2/ PF7 IRQL0/ PF6 IRQL1/ PF5 IRQE/ PF4 Mode D/ PF3 Mode C/ PF2 Mode B/ PF1 Mode A/ PF0 CLKIN, XTAL CLKOUT SPORT0 SPORT1 IRQ1:0 FI, FO PWD PWDACK FL0, FL1, FL2 VDD and GND EZ-Port # of Input/ Pins Output 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I I O O O O O O O O O I I/O I I/O I I/O I I/O I I/O 1 I I/O 1 I I/O 1 I I/O Function Processor Reset Input Bus Request Input Bus Grant Output Bus Grant Hung Output Data Memory Select Output Program Memory Select Output Memory Select Output Byte Memory Select Output Combined Memory Select Output Memory Read Enable Output Memory Write Enable Output Edge- or Level-Sensitive Interrupt Request.1 Programmable I/O Pin Level-Sensitive Interrupt Requests1 Programmable I/O Pin Level-Sensitive Interrupt Requests1 Programmable I/O Pin Edge-Sensitive Interrupt Requests1 Programmable I/O Pin Mode Select Input--Checked Only During RESET Programmable I/O Pin During Normal Operation Mode Select Input--Checked Only During RESET Programmable I/O Pin During Normal Operation Mode Select Input--Checked Only During RESET Programmable I/O Pin During Normal Operation Mode Select Input--Checked Only During RESET Programmable I/O Pin During Normal Operation Clock or Quartz Crystal Input Processor Clock Output Serial Port I/O Pins Serial Port I/O Pins Edge- or Level-Sensitive Interrupts, Flag In, Flag Out2 Power-Down Control Input Power-Down Control Output Output Flags Power and Ground For Emulation Use NOTES 1 Interrupt/Flag Pins retain both functions concurrently. If IMASK is set to enable the corresponding interrupts, then the DSP will vector to the appropriate interrupt vector address when the pin is asserted, either by external devices, or set as a programmable flag. 2 SPORT configuration determined by the DSP System Control Register. Software configurable. Memory Interface Pins The ADSP-2187L processor can be used in one of two modes, Full Memory Mode, which allows BDMA operation with full external overlay memory and I/O capability, or Host Mode, which allows IDMA operation with limited external addressing capabilities. The operating mode is determined by the state of the Mode C pin during RESET and cannot be changed while the processor is running. See tables for Full Memory Mode Pins and Host Mode Pins for descriptions. Full Memory Mode Pins (Mode C = 0) Pin # of Input/ Name(s) Pins Output Function A13:0 14 O Address Output Pins for Program, Data, Byte and I/O Spaces D23:0 24 I/O Data I/O Pins for Program, Data, Byte and I/O Spaces (8 MSBs are also used as Byte Memory addresses) Host Mode Pins (Mode C = 1) Pin Name(s) IAD15:0 A0 D23:8 IWR IRD IAL IS IACK # of Pins 16 1 16 1 1 1 1 1 Input/ Output Function I/O IDMA Port Address/Data Bus O Address Pin for External I/O, Program, Data or Byte access I/O Data I/O Pins for Program, Data Byte and I/O spaces I IDMA Write Enable I IDMA Read Enable I IDMA Address Latch Pin I IDMA Select O IDMA Port Acknowledge Configurable in Mode D; Open Source 2 1 5 5 I O I/O I/O In Host Mode, external peripheral addresses can be decoded using the A0, CMS, PMS, DMS and IOMS signals Terminating Unused Pin The following table shows the recommendations for terminating unused pins. Pin Terminations Pin Name XTAL CLKOUT A13:1 or IAD12:0 A0 D23:8 D7 or IWR I/O 3-State (Z) I O O (Z) I/O (Z) O (Z) I/O (Z) I/O (Z) I Reset State I O Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z I Hi-Z* Caused By Unused Configuration Float Float Float Float Float Float Float High (Inactive) 1 1 3 16 9 I O O I I/O BR, IS BR, BR, BR, EBR EBR EBR EBR -4- REV. 0 ADSP-2187L D6 or IRD D5 or IAL D4 or IS D3 or IACK D2:0 or IAD15:13 PMS DMS BMS IOMS CMS RD WR BR BG BGH IRQ2/PF7 I/O (Z) I I/O (Z) I I/O (Z) I I/O (Z) ** I/O (Z) I/O (Z) O (Z) O (Z) O (Z) O (Z) O (Z) O (Z) O (Z) I O (Z) O I/O (Z) Hi-Z I Hi-Z I Hi-Z I Hi-Z ** Hi-Z Hi-Z O O O O O O O I O O I BR, EBR Float BR, EBR High (Inactive) Float Low (Inactive) BR, EBR Float High (Inactive) BR, EBR Float ** BR, EBR Float IS Float BR, EBR Float BR, EBR Float BR, EBR Float BR, EBR Float BR, EBR Float BR, EBR Float BR, EBR Float High (Inactive) EE Float Float Input = High (Inactive) or Program as Output, Set to 1, Let Float Input = High (Inactive) or Program as Output, Set to 1, Let Float Input = High (Inactive) or Program as Output, Set to 1, Let Float Input = High (Inactive) or Program as Output, Set to 1, Let Float Input = High or Low, Output = Float High or Low High or Low High or Low Float Input = High or Low, Output = Float High or Low High or Low High or Low Float 2. If the Interrupt/Programmable Flag pins are not used, there are two options: Option 1: When these pins are configured as INPUTS at reset and function as interrupts and input flag pins, pull the pins High (inactive). Option 2: Program the unused pins as OUTPUTS, set them to 1, and let them float. 3. All bidirectional pins have three-stated outputs. When the pins is configured as an output, the output is Hi-Z (high impedance) when inactive. 4. CLKIN, RESET, and PF3:0 are not included in the table because these pins must be used. Interrupts IRQL0/PF6 I/O (Z) The interrupt controller allows the processor to respond to the eleven possible interrupts and reset with minimum overhead. The ADSP-2187L provides four dedicated external interrupt input pins, IRQ2, IRQL0, IRQL1 and IRQE. In addition, SPORT1 may be reconfigured for IRQ0, IRQ1, FLAG_IN and FLAG_OUT, for a total of six external interrupts. The ADSP2187L also supports internal interrupts from the timer, the byte DMA port, the two serial ports, software and the power-down control circuit. The interrupt levels are internally prioritized and individually maskable (except power down and reset). The IRQ2, IRQ0 and IRQ1 input pins can be programmed to be either level- or edge-sensitive. IRQL0 and IRQL1 are levelsensitive and IRQE is edge sensitive. The priorities and vector addresses of all interrupts are shown in Table I. Table I. Interrupt Priority and Interrupt Vector Addresses I IRQL1/PF5 I/O (Z) I Source of Interrupt RESET (or Power-Up with PUCR = 1) Power-Down (Nonmaskable) IRQ2 IRQL1 IRQL0 SPORT0 Transmit SPORT0 Receive IRQE BDMA Interrupt SPORT1 Transmit or IRQ1 SPORT1 Receive or IRQ0 Timer Interrupt Vector Address (Hex) 0000 (Highest Priority) 002C 0004 0008 000C 0010 0014 0018 001C 0020 0024 0028 (Lowest Priority) IRQE/PF5 I/O (Z) I SCLK0 RFS0 DR0 TFS0 DT0 SCLK1 RFS1/RQ0 DR1/FI TFS1/RQ1 DT1/FO EE EBR EBG ERESET EMS EINT ECLK ELIN ELOUT I/O I/O I I/O O I/O I/O I I/O O I I O I O I I I O I I I O O I I I O O I I O I O I I I O Interrupt routines can either be nested with higher priority interrupts taking precedence or processed sequentially. Interrupts can be masked or unmasked with the IMASK register. Individual interrupt requests are logically ANDed with the bits in IMASK; the highest priority unmasked interrupt is then selected. The power-down interrupt is nonmaskable. The ADSP-2187L masks all interrupts for one instruction cycle following the execution of an instruction that modifies the IMASK register. This does not affect serial port autobuffering or DMA transfers. The interrupt control register, ICNTL, controls interrupt nesting and defines the IRQ0, IRQ1 and IRQ2 external interrupts to be either edge- or level-sensitive. The IRQE pin is an external edge-sensitive interrupt and can be forced and cleared. The IRQL0 and IRQL1 pins are external level-sensitive interrupts. NOTES **Hi-Z = High Impedance. **Determined by MODE D pin: Mode D = 0 and in host mode: IACK is an active, driven signal and cannot be "wire ORed." If unused, let float. Mode D = 1 and in host mode: IACK is an open source and requires an external pull-down, but multiple IACK pins can be "wire ORed" together. If unused, let float. 1. If the CLKOUT pin is not used, turn it OFF. REV. 0 -5- ADSP-2187L The IFC register is a write-only register used to force and clear interrupts. On-chip stacks preserve the processor status and are automatically maintained during interrupt handling. The stacks are twelve levels deep to allow interrupt, loop and subroutine nesting. The following instructions allow global enable or disable servicing of the interrupts (including power down), regardless of the state of IMASK. Disabling the interrupts does not affect serial port autobuffering or DMA. ENA INTS; DIS INTS; When the processor is reset, interrupt servicing is enabled. LOW POWER OPERATION Slow Idle The IDLE instruction on the ADSP-2187L slows the processor's internal clock signal, further reducing power consumption. The reduced clock frequency, a programmable fraction of the normal clock rate, is specified by a selectable divisor given in the IDLE instruction. The format of the instruction is IDLE (n); where n = 16, 32, 64 or 128. This instruction keeps the processor fully functional, but operating at the slower clock rate. While it is in this state, the processor's other internal clock signals, such as SCLK, CLKOUT and timer clock, are reduced by the same ratio. The default form of the instruction, when no clock divisor is given, is the standard IDLE instruction. When the IDLE (n) instruction is used, it effectively slows down the processor's internal clock and thus its response time to incoming interrupts. The one-cycle response time of the standard idle state is increased by n, the clock divisor. When an enabled interrupt is received, the ADSP-2187L will remain in the idle state for up to a maximum of n processor cycles (n = 16, 32, 64 or 128) before resuming normal operation. When the IDLE (n) instruction is used in systems that have an externally generated serial clock (SCLK), the serial clock rate may be faster than the processor's reduced internal clock rate. Under these conditions, interrupts must not be generated at a faster rate than can be serviced, due to the additional time the processor takes to come out of the idle state (a maximum of n processor cycles). SYSTEM INTERFACE The ADSP-2187L has three low power modes that significantly reduce the power dissipation when the device operates under standby conditions. These modes are: * Power-Down * Idle * Slow Idle The CLKOUT pin may also be disabled to reduce external power dissipation. Power-Down The ADSP-2187L processor has a low power feature that lets the processor enter a very low power dormant state through hardware or software control. Here is a brief list of power-down features. Refer to the ADSP-2100 Family User's Manual, Third Edition, "System Interface" chapter, for detailed information about the power-down feature. * Quick recovery from power-down. The processor begins executing instructions in as few as 400 CLKIN cycles. * Support for an externally generated TTL or CMOS processor clock. The external clock can continue running during powerdown without affecting the 400 CLKIN cycle recovery. * Support for crystal operation includes disabling the oscillator to save power (the processor automatically waits 4096 CLKIN cycles for the crystal oscillator to start and stabilize), and letting the oscillator run to allow 400 CLKIN cycle start up. * Power-down is initiated by either the power-down pin (PWD) or the software power-down force bit Interrupt support allows an unlimited number of instructions to be executed before optionally powering down. The power-down interrupt also can be used as a non-maskable, edge-sensitive interrupt. * Context clear/save control allows the processor to continue where it left off or start with a clean context when leaving the power-down state. * The RESET pin also can be used to terminate power- down. * Power-down acknowledge pin indicates when the processor has entered power-down. Idle Figure 2 shows a typical basic system configuration with the ADSP-2187L, two serial devices, a byte-wide EPROM, and optional external program and data overlay memories (mode selectable). Programmable wait state generation allows the processor to connect easily to slow peripheral devices. The ADSP-2187L also provides four external interrupts and two serial ports or six external interrupts and one serial port. Host Memory Mode allows access to the full external data bus, but limits addressing to a single address bit (A0) Additional system peripherals can be added in this mode through the use of external hardware to generate and latch address signals. Clock Signals The ADSP-2187L can be clocked by either a crystal or a TTLcompatible clock signal. The CLKIN input cannot be halted, changed during operation or operated below the specified frequency during normal operation. The only exception is while the processor is in the powerdown state. For additional information, refer to Chapter 9, ADSP-2100 Family User's Manual, Third Edition, for detailed information on this power-down feature. If an external clock is used, it should be a TTL-compatible signal running at half the instruction rate. The signal is connected to the processor's CLKIN input. When an external clock is used, the XTAL input must be left unconnected. When the ADSP-2187L is in the Idle Mode, the processor waits indefinitely in a low power state until an interrupt occurs. When an unmasked interrupt occurs, it is serviced; execution then continues with the instruction following the IDLE instruction. In Idle Mode IDMA, BDMA and autobuffer cycle steals still occur. -6- REV. 0 ADSP-2187L FULL MEMORY MODE ADSP-2187L 1/2x CLOCK OR CRYSTAL CLKIN XTAL FL0-2 DATA23-0 IRQ2/PF7 IRQE/PF4 IRQL0/PF5 IRQL1/PF6 MODE D/PF3 MODE C/PF2 MODE A/PF0 MODE B/PF1 BMS A10-0 WR RD ADDR D23-8 DATA IOMS A13-0 CS ADDR D23-0 DATA PMS DMS CMS BR BG BGH PWD PWDACK ADDR13-0 D23-16 24 D15-8 DATA CS A0-A21 14 A13-0 BYTE MEMORY Because the ADSP-2187L includes an on-chip oscillator circuit, an external crystal may be used. The crystal should be connected across the CLKIN and XTAL pins, with two capacitors connected as shown in Figure 3. Capacitor values are dependent on crystal type and should be specified by the crystal manufacturer. A parallel-resonant, fundamental frequency, microprocessor-grade crystal should be used. A clock output (CLKOUT) signal is generated by the processor at the processor's cycle rate. This can be enabled and disabled by the CLK0DIS bit in the SPORT0 Autobuffer Control Register. I/O SPACE (PERIPHERALS) 2048 LOCATIONS SPORT1 SERIAL DEVICE SCLK1 RFS1 OR IRQ0 TFS1 OR IRQ1 DT1 OR FO DR1 OR FI OVERLAY MEMORY TWO 8K PM SEGMENTS TWO 8K DM SEGMENTS CLKIN XTAL CLKOUT SPORT0 SERIAL DEVICE SCLK0 RFS0 TFS0 DT0 DR0 DSP Figure 3. External Crystal Connections HOST MEMORY MODE ADSP-2187L 1/2x CLOCK OR CRYSTAL CLKIN A0 XTAL FL0-2 16 IRQ2/PF7 IRQE/PF4 IRQL0/PF5 IRQL1/PF6 MODE D/PF3 MODE C/PF2 MODE A/PF0 MODE B/PF1 DATA23-8 BMS WR RD 1 Reset The RESET signal initiates a master reset of the ADSP-2187L. The RESET signal must be asserted during the power-up sequence to assure proper initialization. RESET during initial power-up must be held long enough to allow the internal clock to stabilize. If RESET is activated any time after power-up, the clock continues to run and does not require stabilization time. The power-up sequence is defined as the total time required for the crystal oscillator circuit to stabilize after a valid VDD is applied to the processor, and for the internal phase-locked loop (PLL) to lock onto the specific crystal frequency. A minimum of 2000 CLKIN cycles ensures that the PLL has locked, but does not include the crystal oscillator start-up time. During this power-up sequence the RESET signal should be held low. On any subsequent resets, the RESET signal must meet the minimum pulsewidth specification, tRSP . The RESET input contains some hysteresis; however, if an RC circuit is used to generate the RESET signal, an external Schmidt trigger is recommended. The master reset sets all internal stack pointers to the empty stack condition, masks all interrupts and clears the MSTAT register. When RESET is released, if there is no pending bus request and the chip is configured for booting, the boot-loading sequence is performed. The first instruction is fetched from on-chip program memory location 0x0000 once boot loading completes. SPORT1 SERIAL DEVICE SCLK1 RFS1 OR IRQ0 TFS1 OR IRQ1 DT1 OR FO DR1 OR FI IOMS SPORT0 SERIAL DEVICE SCLK0 RFS0 TFS0 DT0 DR0 PMS DMS CMS BR BG BGH PWD PWDACK IDMA PORT SYSTEM INTERFACE OR CONTROLLER IRD/D6 IWR/D7 IS/D4 IAL/D5 IACK/D3 IAD15-0 16 Figure 2. ADSP-2187L Basic System Configuration The ADSP-2187L uses an input clock with a frequency equal to half the instruction rate; a 26.00 MHz input clock yields a 19 ns processor cycle (which is equivalent to 52 MHz). Normally, instructions are executed in a single processor cycle. All device timing is relative to the internal instruction clock rate, which is indicated by the CLKOUT signal when enabled. REV. 0 -7- ADSP-2187L Table II. Modes of Operations 1 MODE D2 X MODE C3 0 MODE B4 0 MODE A5 0 Booting Method BDMA feature is used to load the first 32 program memory words from the byte memory space. Program execution is held off until all 32 words have been loaded. Chip is configured in Full Memory Mode.6 No Automatic boot operations occur. Program execution starts at external memory location 0. Chip is configured in Full Memory Mode. BDMA can still be used, but the processor does not automatically use or wait for these operations. BDMA feature is used to load the first 32 program memory words from the byte memory space. Program execution is held off until all 32 words have been loaded. Chip is configured in Host Mode. IACK has active pulldown. (REQUIRES ADDITIONAL HARDWARE.) IDMA feature is used to load any internal memory as desired. Program execution is held off until internal program memory location 0 is written to. Chip is configured in Host Mode.6 IACK has active pull-down. BDMA feature is used to load the first 32 program memory words from the byte memory space. Program execution is held off until all 32 words have been loaded. Chip is configured in Host Mode. IACK has active pulldown. (REQUIRES ADDITIONAL HARDWARE.) IDMA feature is used to load any internal memory as desired. Program execution is held off until internal program memory location 0 is written to. Chip is configured in Host Mode. IACK requires external pull-down.6 X 0 1 0 0 1 0 0 0 1 0 1 1 1 0 0 1 1 0 1 NOTES 1 All mode pins are recognized while RESET is active (low). 2 When Mode D = 0 and in host mode, IACK is an active, driven signal and cannot be "wire ORed". When Mode D = 1 and in host mode, IACK is an open source and requires an external pull-down, multiple IACK pins can be "wire ORed" together. 3 When Mode C = 0, Full Memory enabled. When Mode C = 1, Host Memory Mode enabled. 4 When Mode B = 0, Auto Booting enabled. When Mode B = 1, no Auto Booting. 5 When Mode A = 0, BDMA enabled. When Mode A = 1, IDMA enabled. 6 Considered as standard operating settings. Using these configurations allows for easier design and better memory management. MODES OF OPERATION Table II summarizes the ADSP-2187L memory modes. Setting Memory Mode Memory Mode selection for the ADSP-2187L is made during chip reset through the use of the Mode C pin. This pin is multiplexed with the DSP's PF2 pin, so care must be taken in how the mode selection is made. The two methods for selecting the value of Mode C are active and passive. Passive configuration involves the use a pull-up or pull-down resistor connected to the Mode C pin. To minimize power consumption, or if the PF2 pin is to be used as an output in the DSP application, a weak pull-up or pull-down, on the order of 100 k, can be used. This value should be sufficient to pull the pin to the desired level and still allow the pin to operate as a programmable flag output without undue strain on the processor's output driver. For minimum power consumption during power-down, reconfigure PF2 to be an input, as the pull-up or pull-down will hold the pin in a known state, and will not switch. Active configuration involves the use of a three-statable external driver connected to the Mode C pin. A driver's output enable should be connected to the DSP's RESET signal such that it only drives the PF2 pin when RESET is active (low). When RESET is deasserted, the driver should three-state, thus allowing full use of the PF2 pin as either an input or output. To minimize power consumption during power-down, configure the programmable flag as an output when connected to a threestated buffer. This ensures that the pin will be held at a constant level and not oscillate should the three-state driver's level hover around the logic switching point. MEMORY ARCHITECTURE The ADSP-2187L provides a variety of memory and peripheral interface options. The key functional groups are Program Memory, Data Memory, Byte Memory, and I/O. Refer to the following figures and tables for PM and DM memory allocations in the ADSP-2187L. PROGRAM MEMORY Program Memory (Full Memory Mode) is a 24-bit-wide space for storing both instruction opcodes and data. The ADSP2187L has 32K words of Program Memory RAM on chip, and the capability of accessing up to two 8K external memory overlay spaces using the external data bus. IACK Configuration Mode D = 0 and in host Mode: IACK is an active, driven signal and cannot be "wire ORed." Mode D = 1 and in host mode: IACK is an open source and requires an external pull-down, but multiple IACK pins can be "wire ORed" together. -8- REV. 0 ADSP-2187L PM (MODE B = 0) ALWAYS ACCESSIBLE AT ADDRESS 0 0000 - 0 1FFF 0 2000- 0 3FFF 0 2000- 0 3FFF PM (MODE B = 1)1 RESERVED 0 2000- 0 3FFF ACCESSIBLE WHEN PMOVLAY = 0 INTERNAL RESERVED MEMORY 0 2000- 0 0000- INTERNAL ACCESSIBLE WHEN RESERVED 0 3FFF 0 1FFF2 PMOVLAY = 4 MEMORY 0 2000- ACCESSIBLE WHEN ACCESSIBLE WHEN 2 0 3FFF PMOVLAY = 5 PMOVLAY = 1 0 2000- EXTERNAL ACCESSIBLE WHEN RESERVED 0 3FFF2 MEMORY PMOVLAY = 1 EXTERNAL ACCESSIBLE WHEN 1WHEN MODE B = 1, PMOVLAY MUST BE SET TO 0 MEMORY PMOVLAY = 2 2SEE TABLE III FOR PMOVLAY BITS PROGRAM MEMORY MODE B = 0 ADDRESS 0 3FFF 8K INTERNAL PMOVLAY = 0, 4, 5 OR 8K EXTERNAL PMOVLAY = 1, 2 0 2000 0 1FFF 8K INTERNAL 0 0000 8K EXTERNAL 0 0000 PROGRAM MEMORY MODE B = 1 ADDRESS 0 3FFF 8K INTERNAL PMOVLAY = 0 0 2000 0 1FFF ACCESSIBLE WHEN PMOVLAY = 0 Figure 4. Program Memory Program Memory (Host Mode) allows access to all internal memory. External overlay access is limited by a single external address line (A0). External program execution is not available in host mode due to a restricted data bus that is 16-bits wide only. Table III. PMOVLAY Bits INTERNAL MEMORY DATA MEMORY ALWAYS ACCESSIBLE AT ADDRESS 0 2000 - 0 3FFF 0 2000- 0 1FFF ACCESSIBLE WHEN DMOVLAY = 0 0 0000- 0 1FFF 0 0000- 0 1FFF 0 0000- 0 1FFF 0 0000- 0 1FFF DATA MEMORY ADDRESS 0 3FFF 0 3FE0 0 3FDF 0 2000 0 1FFF 32 MEMORY MAPPED REGISTERS INTERNAL 8160 WORDS PMOVLAY Memory 0, 4, 5 1 Internal External Overlay 1 External Overlay 2 A13 Not Applicable 0 A12:0 Not Applicable 13 LSBs of Address Between 0x2000 and 0x3FFF 13 LSBs of Address Between 0x2000 and 0x3FFF ACCESSIBLE WHEN DMOVLAY = 4 8K INTERNAL DMOVLAY = 0, 4, 5 OR EXTERNAL 8K DMOVLAY = 1, 2 0 0000 ACCESSIBLE WHEN DMOVLAY = 5 ACCESSIBLE WHEN DMOVLAY = 1 EXTERNAL MEMORY ACCESSIBLE WHEN DMOVLAY = 2 2 1 Figure 5. Data Memory Map Data Memory (Host Mode) allows access to all internal memory. External overlay access is limited by a single external address line (A0). The DMOVLAY bits are defined in Table IV. Table IV. DMOVLAY Bits DATA MEMORY Data Memory (Full Memory Mode) is a 16-bit-wide space used for the storage of data variables and for memory-mapped control registers. The ADSP-2187L has 32K words on Data Memory RAM on chip, consisting of 16,352 user-accessible locations and 32 memory-mapped registers. Support also exists for up to two 8K external memory overlay spaces through the external data bus. All internal accesses complete in one cycle. Accesses to external memory are timed using the wait states specified by the DWAIT register. DMOVLAY 0, 4, 5 1 Memory A13 A12:0 Not Applicable 13 LSBs of Address Between 0x2000 and 0x3FFF 13 LSBs of Address Between 0x2000 and 0x3FFF Internal Not Applicable External 0 Overlay 1 External 1 Overlay 2 2 REV. 0 -9- ADSP-2187L I/O Space (Full Memory Mode) Byte Memory The ADSP-2187L supports an additional external memory space called I/O space. This space is designed to support simple connections to peripherals (such as data converters and external registers) or to bus interface ASIC data registers. I/O space supports 2048 locations of 16-bit wide data. The lower eleven bits of the external address bus are used; the upper three bits are undefined. Two instructions were added to the core ADSP-2100 Family instruction set to read from and write to I/O memory space. The I/O space also has four dedicated 3-bit wait state registers, IOWAIT0-3, that specify up to seven wait states to be automatically generated for each of four regions. The wait states act on address ranges as shown in Table V. Table V. Wait States The byte memory space is a bidirectional, 8-bit-wide, external memory space used to store programs and data. Byte memory is accessed using the BDMA feature. The BDMA Control Register is shown in Figure 7. The byte memory space consists of 256 pages, each of which is 16K x 8. The byte memory space on the ADSP-2187L supports read and write operations as well as four different data formats. The byte memory uses data bits 15:8 for data. The byte memory uses data bits 23:16 and address bits 13:0 to create a 22-bit address. This allows up to a 4 meg x 8 (32 megabit) ROM or RAM to be used without glue logic. All byte memory accesses are timed by the BMWAIT register. Byte Memory DMA (BDMA, Full Memory Mode) Address Range 0x000-0x1FF 0x200-0x3FF 0x400-0x5FF 0x600-0x7FF Wait State Register IOWAIT0 IOWAIT1 IOWAIT2 IOWAIT3 The Byte memory DMA controller allows loading and storing of program instructions and data using the byte memory space. The BDMA circuit is able to access the byte memory space while the processor is operating normally, and steals only one DSP cycle per 8-, 16- or 24-bit word transferred. 15 14 13 12 11 10 0 0 0 0 0 0 BDMA CONTROL 98765 0 0 0 0 0 4 0 3 1 2 0 1 0 0 0 DM (0 3FE3) Composite Memory Select (CMS) The ADSP-2187L has a programmable memory select signal that is useful for generating memory select signals for memories mapped to more than one space. The CMS signal is generated to have the same timing as each of the individual memory select signals (PMS, DMS, BMS, IOMS) but can combine their functionality. Each bit in the CMSSEL register, when set, causes the CMS signal to be asserted when the selected memory select is asserted. For example, to use a 32K word memory to act as both program and data memory, set the PMS and DMS bits in the CMSSEL register and use the CMS pin to drive the chip select of the memory; use either DMS or PMS as the additional address bit. The CMS pin functions like the other memory select signals, with the same timing and bus request logic. A 1 in the enable bit causes the assertion of the CMS signal at the same time as the selected memory select signal. All enable bits default to 1 at reset, except the BMS bit. Boot Memory Select (BMS) Disable BMPAGE BDMA OVERLAY BITS BTYPE BDIR 0 = LOAD FROM BM 1 = STORE TO BM BCR 0 = RUN DURING BDMA 1 = HALT DURING BDMA Figure 7. BDMA Control Register The BDMA circuit supports four different data formats that are selected by the BTYPE register field. The appropriate number of 8-bit accesses are done from the byte memory space to build the word size selected. Table VI shows the data formats supported by the BDMA circuit. Table VI. Data Formats BTYPE 00 01 10 11 Internal Memory Space Program Memory Data Memory Data Memory Data Memory Word Size 24 16 8 8 Alignment Full Word Full Word MSBs LSBs The ADSP-2187L also lets you boot the processor from one external memory space while using a different external memory space for BDMA transfers during normal operation. You can use the CMS to select the first external memory space for BDMA transfers and BMS to select the second external memory space for booting. The BMS signal can be disabled by setting Bit 3 of the System Control Register to 1. The System Control Register is illustrated in Figure 6. SYSTEM CONTROL REGISTER 15 14 13 12 11 10 9 8 7 6 5 4 3 0 0 0 0 0 1 0 0 0 0 0 0 0 2 1 1 1 0 1 DM (0 3FFF) PWAIT PROGRAM MEMORY WAIT STATES BMS ENABLE 0 = ENABLED, 1 = DISABLED SPORT0 ENABLE 1 = ENABLED, 0 = DISABLED SPORT1 ENABLE 1 = ENABLED, 0 = DISABLED Unused bits in the 8-bit data memory formats are filled with 0s. The BIAD register field is used to specify the starting address for the on-chip memory involved with the transfer. The 14-bit BEAD register specifies the starting address for the external byte memory space. The 8-bit BMPAGE register specifies the starting page for the external byte memory space. The BDIR register field selects the direction of the transfer. Finally the 14bit BWCOUNT register specifies the number of DSP words to transfer and initiates the BDMA circuit transfers. SPORT1 CONFIGURE 1 = SERIAL PORT 0 = F1, FO, IRQ0, IRQ1, SCLK Figure 6. System Control Register -10- REV. 0 ADSP-2187L BDMA accesses can cross page boundaries during sequential addressing. A BDMA interrupt is generated on the completion of the number of transfers specified by the BWCOUNT register. The BWCOUNT register is updated after each transfer so it can be used to check the status of the transfers. When it reaches zero, the transfers have finished and a BDMA interrupt is generated. The BMPAGE and BEAD registers must not be accessed by the DSP during BDMA operations. The source or destination of a BDMA transfer will always be on-chip program or data memory. When the BWCOUNT register is written with a nonzero value, the BDMA circuit starts executing byte memory accesses with wait states set by BMWAIT. These accesses continue until the count reaches zero. When enough accesses have occurred to create a destination word, it is transferred to or from on-chip memory. The transfer takes one DSP cycle. DSP accesses to external memory have priority over BDMA byte memory accesses. The BDMA Context Reset bit (BCR) controls whether or not the processor is held off while the BDMA accesses are occurring. Setting the BCR bit to 0 allows the processor to continue operations. Setting the BCR bit to 1 causes the processor to stop execution while the BDMA accesses are occurring, to clear the context of the processor and start execution at address 0 when the BDMA accesses have completed. The BDMA overlay bits specify the OVLAY memory blocks to be accessed for internal memory. Internal Memory DMA Port (IDMA Port; Host Memory Mode) The IDMA port has a 16-bit multiplexed address and data bus and supports 24-bit program memory. The IDMA port is completely asynchronous and can be written to while the ADSP-2187L is operating at full speed. The DSP memory address is latched and then automatically incremented after each IDMA transaction. An external device can therefore access a block of sequentially addressed memory by specifying only the starting address of the block. This increases throughput as the address does not have to be sent for each memory access. IDMA Port access occurs in two phases. The first is the IDMA Address Latch cycle. When the acknowledge is asserted, a 14-bit address and 1-bit destination type can be driven onto the bus by an external device. The address specifies an on-chip memory location; the destination type specifies whether it is a DM or PM access. The falling edge of the address latch signal latches this value into the IDMAA register. Once the address is stored, data can either be read from or written to the ADSP-2187L's on-chip memory. Asserting the select line (IS) and the appropriate read or write line (IRD and IWR respectively) signals the ADSP-2187L that a particular transaction is required. In either case, there is a one-processorcycle delay for synchronization. The memory access consumes one additional processor cycle. Once an access has occurred, the latched address is automatically incremented and another access can occur. Through the IDMAA register, the DSP can also specify the starting address and data format for DMA operation. Asserting the IDMA port select (IS) and address latch enable (IAL) directs the ADSP-2187L to write the address onto the IAD0-14 bus into the IDMA Control Register. If IAD[15] is set to 0, IDMA latches the address. If IAD[15] is set to 1, IDMA latches OVLAY memory. The IDMA OVLAY and address are stored in separate memory-mapped registers. The IDMAA register, shown below, is memory mapped at address DM (0x3FE0). Note that the latched address (IDMAA) cannot be read back by the host. The IDMA OVLAY register is memory mapped at address DM (0x3FE7). See Figures 8 and 9 for more information on IDMA and DMA memory maps. IDMA OVERLAY 15 14 13 12 11 10 0 0 0 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 DM(0 3FE7) The IDMA Port provides an efficient means of communication between a host system and the ADSP-2187L. The port is used to access the on-chip program memory and data memory of the DSP with only one DSP cycle per word overhead. The IDMA port cannot be used, however, to write to the DSP's memorymapped control registers. A typical IDMA transfer process is described as follows: 1. Host starts IDMA transfer. 2. Host checks IACK control line to see if the DSP is busy. 3. Host uses IS and IAL control lines to latch either the DMA starting address (IDMAA) or the PM/DM OVLAY selection into the DSP's IDMA control registers. If IAD[15] = 1, the value of IAD[7:0] represent the IDMA overlay: IAD[14:8] must be set to 0. If IAD[15] = 0, the value of IAD[13:0] represent the starting address of internal memory to be accessed and IAD[14] reflects PM or DM for access. 4. Host uses IS and IRD (or IWR) to read (or write) DSP internal memory (PM or DM). 5. Host checks IACK line to see if the DSP has completed the previous IDMA operation. 6. Host ends IDMA transfer. RESERVED SET TO 0 ID DMOVLAY ID PMOVLAY IDMA CONTROL (U = UNDEFINED AT RESET) 15 14 13 12 11 10 U U U U U 9 U 8 U 7 U 6 U 5 U 4 U 3 U 2 U 1 U 0 U DM(0 3FE0) IDMAA ADDRESS IDMAD DESTINATION MEMORY TYPE: 0 = PM 1 = DM Figure 8. IDMA Control/OVLAY Registers REV. 0 -11- ADSP-2187L DMA PROGRAM MEMORY OVLAY ALWAYS ACCESSIBLE AT ADDRESS 0 0000 - 0 1FFF ACCESSIBLE WHEN PMOVLAY = 0 0 2000- 0 3FFF 0 2000- 0 3FFF 0 2000- 0 3FFF DMA DATA MEMORY OVLAY ALWAYS ACCESSIBLE AT ADDRESS 0 2000 - 0 3FFF ACCESSIBLE WHEN DMOVLAY = 0 0 0000- 0 1FFF 0 0000- 0 1FFF 0 0000- 0 1FFF Bus Request and Bus Grant (Full Memory Mode) The ADSP-2187L can relinquish control of the data and address buses to an external device. When the external device requires access to memory, it asserts the bus request (BR) signal. If the ADSP-2187L is not performing an external memory access, it responds to the active BR input in the following processor cycle by: * three-stating the data and address buses and the PMS, DMS, BMS, CMS, IOMS, RD, WR output drivers, * asserting the bus grant (BG) signal, and * halting program execution. If Go Mode is enabled, the ADSP-2187L will not halt program execution until it encounters an instruction that requires an external memory access. If the ADSP-2187L is performing an external memory access when the external device asserts the BR signal, it will not threestate the memory interfaces or assert the BG signal until the processor cycle after the access completes. The instruction does not need to be completed when the bus is granted. If a single instruction requires two external memory accesses, the bus will be granted between the two accesses. When the BR signal is released, the processor releases the BG signal, reenables the output drivers and continues program execution from the point at which it stopped. The bus request feature operates at all times, including when the processor is booting and when RESET is active. The BGH pin is asserted when the ADSP-2187L is ready to execute an instruction, but is stopped because the external bus is already granted to another device. The other device can release the bus by deasserting bus request. Once the bus is released, the ADSP-2187L deasserts BG and BGH and executes the external memory access. Flag I/O Pins ACCESSIBLE WHEN PMOVLAY = 4 ACCESSIBLE WHEN PMOVLAY = 5 ACCESSIBLE WHEN DMOVLAY = 4 ACCESSIBLE WHEN DMOVLAY = 5 NOTE: IDMA AND BDMA HAVE SEPARATE DMA CONTROL REGISTERS Figure 9. Direct Memory Access-PM and DM Memory Maps Bootstrap Loading (Booting) The ADSP-2187L has two mechanisms to allow automatic loading of the internal program memory after reset. The method for booting after reset is controlled by the Mode A, B and C configuration bits. When the mode pins specify BDMA booting, the ADSP-2187L initiates a BDMA boot sequence when reset is released. The BDMA interface is set up during reset to the following defaults when BDMA booting is specified: the BDIR, BMPAGE, BIAD and BEAD registers are set to 0, the BTYPE register is set to 0 to specify program memory 24-bit words, and the BWCOUNT register is set to 32. This causes 32 words of onchip program memory to be loaded from byte memory. These 32 words are used to set up the BDMA to load in the remaining program code. The BCR bit is also set to 1, which causes program execution to be held off until all 32 words are loaded into on-chip program memory. Execution then begins at address 0. The ADSP-2100 Family Development Software (Revision 5.02 and later) fully supports the BDMA booting feature and can generate byte memory space compatible boot code. The IDLE instruction can also be used to allow the processor to hold off execution while booting continues through the BDMA interface. For BDMA accesses while in Host Mode, the addresses to boot memory must be constructed externally to the ADSP-2187L. The only memory address bit provided by the processor is A0. IDMA Port Booting The ADSP-2187L can also boot programs through its Internal DMA port. If Mode C = 1, Mode B = 0 and Mode A = 1, the ADSP-2187L boots from the IDMA port. IDMA feature can load as much on-chip memory as desired. Program execution is held off until on-chip program memory location 0 is written to. The ADSP-2187L has eight general purpose programmable input/output flag pins. They are controlled by two memory mapped registers. The PFTYPE register determines the direction, 1 = output and 0 = input. The PFDATA register is used to read and write the values on the pins. Data being read from a pin configured as an input is synchronized to the ADSP-2187L's clock. Bits that are programmed as outputs will read the value being output. The PF pins default to input during reset. In addition to the programmable flags, the ADSP-2187L has five fixed-mode flags, FLAG_IN, FLAG_OUT, FL0, FL1 and FL2. FL0-FL2 are dedicated output flags. FLAG_IN and FLAG_OUT are available as an alternate configuration of SPORT1. Note: Pins PF0, PF1, PF2 and PF3 are also used for device configuration during reset. -12- REV. 0 ADSP-2187L INSTRUCTION SET DESCRIPTION The ADSP-2187L assembly language instruction set has an algebraic syntax that was designed for ease of coding and readability. The assembly language, which takes full advantage of the processor's unique architecture, offers the following benefits: * The algebraic syntax eliminates the need to remember cryptic assembler mnemonics. For example, a typical arithmetic add instruction, such as AR = AX0 + AY0, resembles a simple equation. * Every instruction assembles into a single, 24-bit word that can execute in a single instruction cycle. * The syntax is a superset ADSP-2100 Family assembly language and is completely source and object code compatible with other family members. Programs may need to be relocated to utilize on-chip memory and conform to the ADSP2187L's interrupt vector and reset vector map. * Sixteen condition codes are available. For conditional jump, call, return or arithmetic instructions, the condition can be checked and the operation executed in the same instruction cycle. * Multifunction instructions allow parallel execution of an arithmetic instruction with up to two fetches or one write to processor memory space during a single instruction cycle. DESIGNING AN EZ-ICE-COMPATIBLE SYSTEM One method of ensuring that the values located on the mode pins are those desired is to construct a circuit like the one shown in Figure 10. This circuit forces the value located on the Mode A pin to logic high; regardless if it latched via the RESET or ERESET pin. ERESET RESET ADSP-2187L 1k MODE A/PFO PROGRAMMABLE I/O Figure 10. Mode A Pin/EZ-ICE Circuit The ICE-Port interface consists of the following ADSP-2187L pins: EBR EMS ELIN EBG EINT ELOUT ERESET ECLK EE The ADSP-2187L has on-chip emulation support and an ICEPort, a special set of pins that interface to the EZ-ICE. These features allow in-circuit emulation without replacing the target system processor by using only a 14-pin connection from the target system to the EZ-ICE. Target systems must have a 14-pin connector to accept the EZ-ICE's in-circuit probe, a 14-pin plug. See the ADSP-2100 Family EZ-Tools data sheet for complete information on ICE products. Issuing the chip reset command during emulation causes the DSP to perform a full chip reset, including a reset of its memory mode. Therefore, it is vital that the mode pins are set correctly PRIOR to issuing a chip reset command from the emulator user interface. If you are using a passive method of maintaining mode information (as discussed in Setting Memory Modes) then it does not matter that the mode information is latched by an emulator reset. However, if you are using the RESET pin as a method of setting the value of the mode pins, then you have to take into consideration the effects of an emulator reset. These ADSP-2187L pins must be connected only to the EZ-ICE connector in the target system. These pins have no function except during emulation, and do not require pull-up or pull-down resistors. The traces for these signals between the ADSP-2187L and the connector must be kept as short as possible, no longer than three inches. The following pins are also used by the EZ-ICE: BR RESET BG GND The EZ-ICE uses the EE (emulator enable) signal to take control of the ADSP-2187L in the target system. This causes the processor to use its ERESET, EBR and EBG pins instead of the RESET, BR and BG pins. The BG output is three-stated. These signals do not need to be jumper-isolated in your system. The EZ-ICE connects to your target system via a ribbon cable and a 14-pin female plug. The ribbon cable is 10 inches in length with one end fixed to the EZ-ICE. The female plug is plugged onto the 14-pin connector (a pin strip header) on the target board. REV. 0 -13- ADSP-2187L Target Board Connector for EZ-ICE Probe PM, DM, BM, IOM and CM The EZ-ICE connector (a standard pin strip header) is shown in Figure 11. You must add this connector to your target board design if you intend to use the EZ-ICE. Be sure to allow enough room in your system to fit the EZ-ICE probe onto the 14-pin connector. 1 GND 3 EBG 2 BG 4 BR 6 EINT Design your Program Memory (PM), Data Memory (DM), Byte Memory (BM), I/O Memory (IOM) and Composite Memory (CM) external interfaces to comply with worst case device timing requirements and switching characteristics as specified in the DSP's data sheet. The performance of the EZ-ICE may approach published worst case specification for some memory access timing requirements and switching characteristics. Note: If your target does not meet the worst case chip specification for memory access parameters, you may not be able to emulate your circuitry at the desired CLKIN frequency. Depending on the severity of the specification violation, you may have trouble manufacturing your system as DSP components statistically vary in switching characteristic and timing requirements within published limits. Restriction: All memory strobe signals on the ADSP-2187L (RD, WR, PMS, DMS, BMS, CMS and IOMS) used in your target system must have 10 k pull-up resistors connected when the EZ-ICE is being used. The pull-up resistors are necessary because there are no internal pull-ups to guarantee their state during prolonged three-state conditions resulting from typical EZ-ICE debugging sessions. These resistors may be removed at your option when the EZ-ICE is not being used. Target System Interface Signals 5 EBR 7 8 ELIN KEY (NO PIN) 9 ELOUT 10 ECLK 11 EE 12 EMS 13 RESET 14 ERESET TOP VIEW Figure 11. Target Board Connector for EZ-ICE The 14-pin, 2-row pin strip header is keyed at the Pin 7 location--you must remove Pin 7 from the header. The pins must be 0.025 inch square and at least 0.20 inch in length. Pin spacing should be 0.1 x 0.1 inches. The pin strip header must have at least 0.15 inch clearance on all sides to accept the EZ-ICE probe plug. Pin strip headers are available from vendors such as 3M, McKenzie and Samtec. Target Memory Interface When the EZ-ICE board is installed, the performance on some system signals changes. Design your system to be compatible with the following system interface signal changes introduced by the EZ-ICE board: * EZ-ICE emulation introduces an 8 ns propagation delay between your target circuitry and the DSP on the RESET signal. * EZ-ICE emulation introduces an 8 ns propagation delay between your target circuitry and the DSP on the BR signal. * EZ-ICE emulation ignores RESET and BR when singlestepping. * EZ-ICE emulation ignores RESET and BR when in Emulator Space (DSP halted). * EZ-ICE emulation ignores the state of target BR in certain modes. As a result, the target system may take control of the DSP's external memory bus only if bus grant (BG) is asserted by the EZ-ICE board's DSP. For your target system to be compatible with the EZ-ICE emulator, it must comply with the memory interface guidelines listed below. -14- REV. 0 SPECIFICATIONS RECOMMENDED OPERATING CONDITIONS K Grade Parameter VDD TAMB Supply Voltage Ambient Operating Temperature Min 3.0 0 Max 3.6 +70 Min 3.0 -40 B Grade ADSP-2187L Max 3.6 +85 Unit V C ELECTRICAL CHARACTERISTICS Parameter VIH VIH VIL VOH Hi-Level Input Voltage1, 2 Hi-Level CLKIN Voltage Lo-Level Input Voltage1, 3 Hi-Level Output Voltage 1, 4, 5 Test Conditions @ VDD = max @ VDD = max @ VDD = min @ VDD = min IOH = -0.5 mA @ VDD = min IOH = -100 A 6 @ VDD = min IOL = 2 mA @ VDD = max VIN = VDD max @ VDD = max VIN = 0 V @ VDD = max VIN = VDD max8 @ VDD = max VIN = 0 V 8 @ VDD = 3.3 tCK = 19 ns10 tCK = 25 ns10 tCK = 30 ns10 @ VDD = 3.3 TAMB = +25C tCK = 19 ns10 tCK = 25 ns10 tCK = 30 ns10 @ VIN = 2.5 V fIN = 1.0 MHz TAMB = +25C @ VIN = 2.5 V fIN = 1.0 MHz TAMB = +25C Min 2.0 2.2 0.8 2.4 VDD - 0.3 0.4 10 10 10 10 10 8 7 K/B Grades Typ Max Unit V V V V V V A A A A mA mA mA VOL IIH IIL IOZH IOZL IDD Lo-Level Output Voltage1, 4, 5 Hi-Level Input Current 3 Lo-Level Input Current3 Three-State Leakage Current7 Three-State Leakage Current7 Supply Current (Idle)9 IDD Supply Current (Dynamic) 11 51 41 34 mA mA mA CI CO Input Pin Capacitance3, 6, 12 Output Pin Capacitance 6, 7, 12, 13 8 pF 8 pF NOTES 11 Bidirectional pins: D0-D23, RFS0, RFS1, SCLK0, SCLK1, TFS0, TFS1, A1-A13, PF0-PF7. 12 Input only pins: RESET, BR, DR0, DR1, PWD. 13 Input only pins: CLKIN, RESET, BR, DR0, DR1, PWD. 14 Output pins: BG, PMS, DMS, BMS, IOMS, CMS, RD, WR, PWDACK, A0, DT0, DT1, CLKOUT, FL2-0, BGH. 15 Although specified for TTL outputs, all ADSP-2187L outputs are CMOS-compatible and will drive to V DD and GND, assuming no dc loads. 16 Guaranteed but not tested. 17 Three-statable pins: A0-A13, D0-D23, PMS, DMS, BMS, IOMS, CMS, RD, WR, DT0, DT1, SCLK0, SCLK1, TFS0, TFS1, RFS0, RFS1, PF0-PF7. 18 0 V on BR. 19 Idle refers to ADSP-2187L state of operation during execution of IDLE instruction. Deasserted pins are driven to either V DD or GND. 10 V IN = 0 V and 3 V. For typical figures for supply currents, refer to Power Dissipation section. 11 I DD measurement taken with all instructions executing from internal memory. 50% of the instructions are multifunction (types 1, 4, 5, 12, 13, 14), 30% are type 2 and type 6, and 20% are idle instructions. 12 Applies to TQFP package type. 13 Output pin capacitance is the capacitive load for any three-stated output pin. Specifications subject to change without notice. REV. 0 -15- ADSP-2187L ABSOLUTE MAXIMUM RATINGS * Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to +4.6 V Input Voltage . . . . . . . . . . . . . . . . . . . . . -0.5 V to VDD + 0.5 V Output Voltage Swing . . . . . . . . . . . . . . -0.5 V to VDD + 0.5 V Operating Temperature Range (Ambient) . . . . -40C to +85C Storage Temperature Range . . . . . . . . . . . . . -65C to +150C Lead Temperature (5 sec) TQFP . . . . . . . . . . . . . . . . +280C *Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ESD SENSITIVITY The ADSP-2187L is an ESD (electrostatic discharge) sensitive device. Electrostatic charges readily accumulate on the human body and equipment and can discharge without detection. Permanent damage may occur to devices subjected to high energy electrostatic discharges. The ADSP-2187L features proprietary ESD protection circuitry to dissipate high energy discharges (Human Body Model). Per method 3015 of MIL-STD-883, the ADSP-2187L has been classified as a Class 1 device. Proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Unused devices must be stored in conductive foam or shunts, and the foam should be discharged to the destination before devices are removed. WARNING! ESD SENSITIVE DEVICE TIMING PARAMETERS GENERAL NOTES MEMORY TIMING SPECIFICATIONS Use the exact timing information given. Do not attempt to derive parameters from the addition or subtraction of others. While addition or subtraction would yield meaningful results for an individual device, the values given in this data sheet reflect statistical variations and worst cases. Consequently, you cannot meaningfully add up parameters to derive longer times. TIMING NOTES The table below shows common memory device specifications and the corresponding ADSP-2187L timing parameters, for your convenience. Memory Device Specification Address Setup to Write Start Address Setup to Write End Address Hold Time Data Setup Time Data Hold Time OE to Data Valid Address Access Time ADSP-2187L Timing Parameter tASW tAW tWRA tDW tDH tRDD tAA Timing Parameter Definition A0-A13, xMS Setup before WR Low A0-A13, xMS Setup before WR Deasserted A0-A13, xMS Hold before WR Low Data Setup before WR High Data Hold after WR High RD Low to Data Valid A0-A13, xMS to Data Valid Switching Characteristics specify how the processor changes its signals. You have no control over this timing--circuitry external to the processor must be designed for compatibility with these signal characteristics. Switching characteristics tell you what the processor will do in a given circumstance. You can also use switching characteristics to ensure that any timing requirement of a device connected to the processor (such as memory) is satisfied. Timing Requirements apply to signals that are controlled by circuitry external to the processor, such as the data input for a read operation. Timing requirements guarantee that the processor operates correctly with other devices. xMS = PMS, DMS, BMS, CMS, IOMS. FREQUENCY DEPENDENCY FOR TIMING SPECIFICATIONS tCK = Instruction Clock Period. tCKI = External Clock Period. tCK is defined as 0.5tCKI. The ADSP-2187L uses an input clock with a frequency equal to half the instruction rate: a 26 MHz input clock (which is equivalent to 38 ns) yields a 19 ns processor cycle (equivalent to 52 MHz). tCK values within the range of 0.5tCKI period should be substituted for all relevant timing parameters to obtain the specification value. Example: tCKH = 0.5tCK - 7 ns = 0.5 (19 ns) - 7 ns = 2.5 ns -16- REV. 0 ADSP-2187L OUTPUT DRIVE CURRENTS Figure 12 shows typical I-V characteristics for the output drivers of the ADSP-2187L. The curves represent the current drive capability of the output drivers as a function of output voltage. 80 3.6V, -40 C 60 SOURCE CURRENT - mA 40 20 3.0V, +85 C 0 -20 -40 -60 -80 3.6V, -40 C 3.0V, +85 C 3.3V, +25 C 3.3V, +25 C Total Power Dissipation = PINT + (C x VDD2 x f ) PINT = internal power dissipation from Power vs. Frequency graph, see Figure 14. (C x VDD 2 x f ) is calculated for each output: # of Pins x C Address, DMS Data Output, WR RD CLKOUT 8 9 1 1 x 10 pF x 10 pF x 10 pF x 10 pF x VDD 2 x 3.3 x 3.3 2 x 3.3 2 x 3.3 2 2 xf x 33.3 MHz x 16.67 MHz x 16.67 MHz x 33.3 MHz = 29.0 mW = 16.3 mW = 1.8 mW = 3.6 mW 50.7 mW V V V V Total power dissipation for this example is PINT + 50.7 mW. 2187L POWER, INTERNAL1, 3, 4 250 216mW 200 POWER - mW VDD = 3.6V 168.3mW 150 144mW 100 112.2mW 87mW VDD = 3.0V VDD = 3.3V 132mW 0 0.5 1 1.5 2 2.5 3 SOURCE VOLTAGE - Volts 3.5 4 Figure 12. Typical Drive Currents Figure 13 shows the typical power-down supply current. 1000 VDD = 3.6V VDD = 3.3V VDD = 3.0V 100 50 CURRENT (LOG SCALE) - A 0 33.3 FREQUENCY - MHz 52 POWER, IDLE1, 2, 3 45 40 VDD = 3.6V 35 35mW VDD = 3.3V 25mW 32mW VDD = 3.0V 30mW 23mW 10 POWER - mW 0 0 25 55 85 TEMPERATURE - C NOTES: 1. REFLECTS ADSP-2187L OPERATION IN LOWEST POWER MODE. (SEE "SYSTEM INTERFACE" CHAPTER OF THE ADSP-2100 FAMILY USER'S MANUAL FOR DETAILS.) 2. CURRENT REFLECTS DEVICE OPERATING WITH NO INPUT LOADS. 30 25 20 15 10 5 21mW 0 33.33 FREQUENCY - MHz 52 POWER, IDLE n MODES3 45 40 Figure 13. Power-Down Supply Current (Typical) POWER DISSIPATION POWER - mW 35 30 25 20 15 10mW 10 9mW 5 8 33.33 FREQUENCY - MHz 23mW To determine total power dissipation in a specific application, the following equation should be applied for each output: C x VDD2 x f C = load capacitance, f = output switching frequency. Example: 32mW IDLE 13mW 12mW IDLE (16) IDLE (128) In an application where external data memory is used and no other outputs are active, power dissipation is calculated as follows: Assumptions: 52 * * * * External data memory is accessed every cycle with 50% of the address pins switching. External data memory writes occur every other cycle with 50% of the data pins switching. Each address and data pin has a 10 pF total load at the pin. The application operates at VDD = 3.3 V and tCK = 34.7 ns. -17- VALID FOR ALL TEMPERATURE GRADES. 1POWER REFLECTS DEVICE OPERATING WITH NO OUTPUT LOADS. 2IDLE REFERS TO ADSP-2187L STATE OF OPERATION DURING EXECUTION OF IDLE INSTRUCTION. DEASSERTED PINS ARE DRIVEN TO EITHER VDD OR GND. 3TYPICAL POWER DISSIPATION AT 3.3V V DD AND 25 C EXCEPT WHERE SPECIFIED. 4I DD MEASUREMENT TAKEN WITH ALL INSTRUCTIONS EXECUTING FROM INTERNAL MEMORY. 50% OF THE INSTRUCTIONS ARE MULTIFUNCTION (TYPES 1, 4, 5, 12, 13, 14), 30% ARE TYPE 2 AND TYPE 6, AND 20% ARE IDLE INSTRUCTIONS. Figure 14. Power vs. Frequency REV. 0 ADSP-2187L CAPACITIVE LOADING Figures 15 and 16 show the capacitive loading characteristics of the ADSP-2187L. 18 16 RISE TIME (0.4V - 2.4V) - ns 14 12 10 8 6 4 2 0 0 50 100 150 CL - pF 200 250 T = +85 C VDD = 3.0V INPUT OR OUTPUT 1.5V 1.5V Figure 17. Voltage Reference Levels for AC Measurements (Except Output Enable/Disable) Output Enable Time Output pins are considered to be enabled when they have made a transition from a high-impedance state to when they start driving. The output enable time (tENA) is the interval from when a reference signal reaches a high or low voltage level to when the output has reached a specified high or low trip point, see Figure 18. If multiple pins (such as the data bus) are enabled, the measurement value is that of the first pin to start driving. REFERENCE SIGNAL tMEASURED tENA VOH (MEASURED) OUTPUT VOL (MEASURED) tDIS VOH (MEASURED) - 0.5V VOL (MEASURED) +0.5V 2.0V 1.0V Figure 15. Typical Output Rise Time vs. Load Capacitance, CL (at Maximum Ambient Operating Temperature) 10 9 8 VALID OUTPUT DELAY OR HOLD - ns 7 6 5 4 3 2 1 VOH (MEASURED) tDECAY OUTPUT STOPS DRIVING VOL (MEASURED) OUTPUT STARTS DRIVING HIGH-IMPEDANCE STATE. TEST CONDITIONS CAUSE THIS VOLTAGE LEVEL TO BE APPROXIMATELY 1.5V. Figure 18. Output Enable/Disable IOL NOMINAL -1 -2 -3 -4 0 20 40 60 80 100 120 CL - pF 140 160 180 200 TO OUTPUT PIN +1.5V 50pF Figure 16. Typical Output Valid Delay or Hold vs. Load Capacitance, CL (at Maximum Ambient Operating Temperature) TEST CONDITIONS Output Disable Time IOH Figure 19. Equivalent Device Loading for AC Measurements (Including All Fixtures) ENVIRONMENTAL CONDITIONS Output pins are considered to be disabled when they have stopped driving and started a transition from the measured output high or low voltage to a high impedance state, see Figure 17. The output disable time (tDIS) is the difference between tMEASURED and tDECAY, see Figure 18. The time is the interval from when a reference signal reaches a high or low voltage level to when the output voltages have changed by 0.5 V from the measured output high or low voltage. The decay time, tDECAY, is dependent on the capacitive load, CL, and the current load, iL, on the output pin. It can be approximated by the following equation: t DECAY = from which t DIS = t MEASURED - t DECAY is calculated. If multiple pins (such as the data bus) are disabled, the measurement value is that of the last pin to stop driving. CL * 0.5V iL Ambient Temperature Rating is shown below: TAMB = TCASE - (PD x CA) TCASE = Case Temperature in C PD = Power Dissipation in W CA = Thermal Resistance (Case-to-Ambient) J A = Thermal Resistance (Junction-to-Ambient) J C = Thermal Resistance (Junction-to-Case) Package TQFP JA 50C/W JC 2C/W CA 48C/W -18- REV. 0 ADSP-2187L TIMING PARAMETERS (See page 16, Frequency Depending for Timing Specifications, for timing definitions.) Parameter Clock Signals and Reset Timing Requirements: tCKI CLKIN External Clock Period CLKIN Width Low tCKIL CLKIN Width High tCKIH Switching Characteristics: CLKOUT Width Low tCKL CLKOUT Width High tCKH CLKIN High to CLKOUT High tCKOH Control Signals Timing Requirement: RESET Width Low tRSP Mode Setup before RESET High tMS tMH Mode Hold after RESET High 5tCK1 2 5 ns ns ns 38 15 15 0.5tCK - 7 0.5tCK - 7 0 100 ns ns ns ns ns ns Min Max Unit 20 NOTE 1 Applies after power-up sequence is complete. Internal phase lock loop requires no more than 2000 CLKIN cycles assuming stable CLKIN (not including crystal oscillator start-up time). tCKI tCKIH CLKIN tCKIL tCKOH tCKH CLKOUT tCKL PF(3:0)* tMS RESET tMH *PF3 IS MODE D, PF2 IS MODE C, PF1 IS MODE B, PF0 IS MODE A Figure 20. Clock Signals REV. 0 -19- ADSP-2187L Parameter Interrupts and Flag Timing Requirements: tIFS IRQx, FI, or PFx Setup before CLKOUT Low1, 2, 3, 4 IRQx, FI, or PFx Hold after CLKOUT High1, 2, 3, 4 tIFH Switching Characteristics: Flag Output Hold after CLKOUT Low5 tFOH tFOD Flag Output Delay from CLKOUT Low5 0.25tCK + 15 0.25tCK 0.5tCK - 7 0.15tCK + 6 ns ns ns ns Min Max Unit NOTES 1 If IRQx and FI inputs meet t IFS and t IFH setup/hold requirements, they will be recognized during the current clock cycle; otherwise the signals will be recognized on the following cycle. (Refer to Interrupt Controller Operation in the Program Control chapter of the User's Manual for further information on interrupt servicing.) 2 Edge-sensitive interrupts require pulsewidths greater than 10 ns; level-sensitive interrupts must be held low until serviced. 3 IRQx = IRQ0, IRQ1, IRQ2, IRQL0, IRQL1, IRQE. 4 PFx = PF0, PF1, PF2, PF3, PF4, PF5, PF6, PF7. 5 Flag outputs = PFx, FL0, FL1, FL2, Flag_out4. tFOD CLKOUT tFOH FLAG OUTPUTS tIFH IRQx FI PFx tIFS Figure 21. Interrupts and Flags -20- REV. 0 ADSP-2187L Parameter Bus Request-Bus Grant Timing Requirements: tBH BR Hold after CLKOUT High1 BR Setup before CLKOUT Low1 tBS Switching Characteristics: CLKOUT High to xMS, RD, WR Disable tSD xMS, RD, WR Disable to BG Low tSDB BG High to xMS, RD, WR Enable tSE xMS, RD, WR Enable to CLKOUT High tSEC xMS, RD, WR Disable to BGH Low2 tSDBH tSEH BGH High to xMS, RD, WR Enable 2 0.25tCK + 2 0.25tCK + 17 0.25tCK + 10 0 0 0.25tCK - 4 0 0 ns ns ns ns ns ns ns ns Min Max Unit NOTES xMS = PMS, DMS, CMS, IOMS, BMS. 1 BR is an asynchronous signal. If BR meets the setup/hold requirements, it will be recognized during the current clock cycle; otherwise the signal will be recognized on the following cycle. Refer to the ADSP-2100 Family User's Manual, Third Edition for BR/BG cycle relationships. 2 BGH is asserted when the bus is granted and the processor requires control of the bus to continue. tBH CLKOUT BR tBS CLKOUT PMS, DMS BMS, RD WR tSD tSEC BG tSDB tSE BGH tSDBH tSEH Figure 22. Bus Request-Bus Grant REV. 0 -21- ADSP-2187L Parameter Memory Read Timing Requirements: tRDD RD Low to Data Valid A0-A13, xMS to Data Valid tAA Data Hold from RD High tRDH Switching Characteristics: RD Pulsewidth tRP CLKOUT High to RD Low tCRD A0-A13, xMS Setup before RD Low tASR A0-A13, xMS Hold after RD Deasserted tRDA tRWR RD High to RD or WR Low w = wait states x t CK xMS = PMS, DMS, CMS, IOMS, BMS. Min Max Unit 0.5tCK - 9 + w 0.75tCK - 12.5 + w 0 0.5tCK - 5 + w 0.25tCK - 5 0.25tCK - 6 0.25tCK - 3 0.5tCK - 5 ns ns ns ns ns ns ns ns 0.25tCK + 7 CLKOUT A0-A13 DMS, PMS, BMS, IOMS, CMS tRDA RD tASR tCRD D tRP tRWR tAA WR tRDD tRDH Figure 23. Memory Read -22- REV. 0 ADSP-2187L Parameter Memory Write Switching Characteristics: tDW Data Setup before WR High Data Hold after WR High tDH WR Pulsewidth tWP WR Low to Data Enabled tWDE A0-A13, xMS Setup before WR Low tASW Data Disable before WR or RD Low tDDR CLKOUT High to WR Low tCWR A0-A13, xMS, Setup before Deasserted tAW A0-A13, xMS Hold after WR Deasserted tWRA tWWR WR High to RD or WR Low w = wait states x t CK. xMS = PMS, DMS, CMS, IOMS, BMS. Min Max Unit 0.5tCK - 7 + w 0.25tCK - 2 0.5tCK - 5 + w 0 0.25tCK - 6 0.25tCK - 7 0.25tCK - 5 0.75tCK - 9 + w 0.25tCK - 3 0.5tCK - 5 0.25 tCK + 7 ns ns ns ns ns ns ns ns ns ns CLKOUT A0-A13 DMS, PMS, BMS, CMS, IOMS tWRA WR tASW tAW tCWR D tWP tDH tWWR tDDR tDW tWDE RD Figure 24. Memory Write REV. 0 -23- ADSP-2187L Parameter Serial Ports Timing Requirements: tSCK SCLK Period DR/TFS/RFS Setup before SCLK Low tSCS DR/TFS/RFS Hold after SCLK Low tSCH SCLKIN Width tSCP Switching Characteristics: CLKOUT High to SCLKOUT tCC SCLK High to DT Enable tSCDE SCLK High to DT Valid tSCDV TFS/RFSOUT Hold after SCLK High tRH TFS/RFSOUT Delay from SCLK High tRD DT Hold after SCLK High tSCDH TFS (Alt) to DT Enable tTDE TFS (Alt) to DT Valid tTDV SCLK High to DT Disable tSCDD tRDV RFS (Multichannel, Frame Delay Zero) to DT Valid CLKOUT Min Max Unit 38 4 7 15 0.25tCK 0 0 15 0 0 14 15 15 0.25tCK + 10 15 ns ns ns ns ns ns ns ns ns ns ns ns ns ns tCC tCC tSCP tSCS tSCH tSCK SCLK tSCP DR TFSIN RFSIN tRD tRH RFSOUT TFSOUT tSCDV tSCDE DT tSCDD tSCDH tTDE tTDV TFSOUT ALTERNATE FRAME MODE tRDV RFSOUT MULTICHANNEL MODE, FRAME DELAY 0 (MFD = 0) tTDE tTDV TFSIN ALTERNATE FRAME MODE tRDV RFSIN MULTICHANNEL MODE, FRAME DELAY 0 (MFD = 0) Figure 25. Serial Ports -24- REV. 0 ADSP-2187L Parameter IDMA Address Latch Timing Requirements: tIALP Duration of Address Latch1, 2 IAD15-0 Address Setup before Address Latch End2 tIASU IAD15-0 Address Hold after Address Latch End2 tIAH IACK Low before Start of Address Latch2, 3 tIKA Start of Write or Read after Address Latch End2, 3 tIALS tIALD Address Latch Start after Address Latch End1, 2 NOTES 1 Start of Address Latch = IS Low and IAL High. 2 End of Address Latch = IS High or IAL Low. 3 Start of Write or Read = IS Low and IWR Low or IRD Low. Min Max Unit 10 5 2 0 3 2 ns ns ns ns ns ns IACK tIKA IAL tIALD tIALP tIALP IS IAD15-0 tIASU tIAH tIASU tIAH tIALS RD OR WR Figure 26. IDMA Address Latch REV. 0 -25- ADSP-2187L Parameter IDMA Write, Short Write Cycle Timing Requirements: tIKW IACK Low before Start of Write1 Duration of Write1, 2 tIWP IAD15-0 Data Setup before End of Write2, 3, 4 tIDSU IAD15-0 Data Hold after End of Write2, 3, 4 tIDH Switching Characteristic: tIKHW Start of Write to IACK High NOTES 1 Start of Write = IS Low and IWR Low. 2 End of Write = IS High or IWR High. 3 If Write Pulse ends before IACK Low, use specifications tIDSU, tIDH . 4 If Write Pulse ends after IACK Low, use specifications t IKSU, tIKH . tIKW IACK Min Max Unit 0 15 5 2 4 15 ns ns ns ns ns tIKHW IS tIWP IWR tIDSU IAD15-0 DATA tIDH Figure 27. IDMA Write, Short Write Cycle -26- REV. 0 ADSP-2187L Parameter IDMA Write, Long Write Cycle Timing Requirements: tIKW IACK Low before Start of Write1 IAD15-0 Data Setup before IACK Low2, 3, 4 tIKSU IAD15-0 Data Hold after IACK Low2, 3, 4 tIKH Switching Characteristics: Start of Write to IACK Low4 tIKLW tIKHW Start of Write to IACK High 0 0.5tCK + 10 2 1.5tCK 4 ns ns ns ns ns Min Max Unit 15 NOTES 1 Start of Write = IS Low and IWR Low. 2 If Write Pulse ends before IACK Low, use specifications tIDSU, tIDH . 3 If Write Pulse ends after IACK Low, use specifications t IKSU, tIKH . 4 This is the earliest time for IACK Low from Start of Write. For IDMA Write cycle relationships, please refer to the ADSP-2100 Family User's Manual, Third Edition. tIKW IACK tIKHW tIKLW IS IWR tIKSU IAD15-0 DATA tIKH Figure 28. IDMA Write, Long Write Cycle REV. 0 -27- ADSP-2187L Parameter IDMA Read, Long Read Cycle Timing Requirements: tIKR IACK Low before Start of Read1 End of Read after IACK Low2 tIRK Switching Characteristics: IACK High after Start of Read1 tIKHR IAD15-0 Data Setup before IACK Low tIKDS IAD15-0 Data Hold after End of Read2 tIKDH IAD15-0 Data Disabled after End of Read2 tIKDD IAD15-0 Previous Data Enabled after Start of Read tIRDE IAD15-0 Previous Data Valid after Start of Read tIRDV IAD15-0 Previous Data Hold after Start of Read (DM/PM1)3 tIRDH1 tIRDH2 IAD15-0 Previous Data Hold after Start of Read (PM2)4 NOTES 1 Start of Read = IS Low and IRD Low. 2 End of Read = IS High or IRD High. 3 DM read or first half of PM read. 4 Second half of PM read. Min Max Unit 0 2 4 0.5tCK - 7 0 0 10 2tCK - 5 tCK - 5 15 ns ns ns ns ns ns ns ns ns ns 10 IACK tIKR IS tIKHR tIRK IRD tIRDE IAD15-0 PREVIOUS DATA tIKDS READ DATA tIKDH tIRDV tIRDH tIKDD Figure 29. IDMA Read, Long Read Cycle -28- REV. 0 ADSP-2187L Parameter IDMA Read, Short Read Cycle Timing Requirements: tIKR IACK Low before Start of Read1 Duration of Read tIRP Switching Characteristics: IACK High after Start of Read1 tIKHR IAD15-0 Data Hold after End of Read2 tIKDH IAD15-0 Data Disabled after End of Read2 tIKDD IAD15-0 Previous Data Enabled after Start of Read tIRDE tIRDV IAD15-0 Previous Data Valid after Start of Read NOTES 1 Start of Read = IS Low and IRD Low. 2 End of Read = IS High or IRD High. Min Max Unit 0 15 4 0 0 10 15 10 ns ns ns ns ns ns ns IACK tIKR IS tIKHR tIRP IRD tIRDE IAD15-0 PREVIOUS DATA tIKDH tIRDV tIKDD Figure 30. IDMA Read, Short Read Cycle REV. 0 -29- ADSP-2187L 100-Lead TQFP Package Pinout 94 PF0 [MODE A] 93 PF1 [MODE B] 92 GND 100 A3/IAD2 89 PF2 [MODE C] 88 PF3 [MODE D] 96 PWDACK 95 BGH 99 A2/IAD1 98 A1/IAD0 91 PWD 90 VDD 81 D20 80 GND 77 D17 79 D19 78 D18 82 D21 84 D23 83 D22 86 FL1 85 FL2 87 FL0 97 A0 76 D16 75 D15 74 D14 73 D13 72 D12 71 GND 70 D11 69 D10 68 D9 67 VDD 66 GND 65 D8 64 D7/IWR 63 D6/IRD 62 D5/IAL 61 D4/IS 60 GND 59 VDD 58 D3/IACK 57 D2/IAD15 56 D1/IAD14 55 D0/IAD13 54 BG 53 EBG 52 BR 51 EBR EINT 50 A4/IAD3 A5/IAD4 GND A6/IAD5 A7/IAD6 A8/IAD7 A9/IAD8 A10/IAD9 1 2 3 4 5 6 7 8 PIN 1 IDENTIFIER A11/IAD10 9 A12/IAD11 10 A13/IAD12 11 GND 12 CLKIN 13 XTAL 14 VDD 15 CLKOUT 16 GND 17 VDD 18 WR 19 RD 20 BMS 21 DMS 22 PMS 23 IOMS 24 CMS 25 VDD 36 DT1 37 RFS1 39 GND 41 SCLK1 42 RESET 44 EMS 45 EE 46 ECLK 47 IRQL0+PF5 27 GND 28 IRQL1+PF6 29 SCLK0 35 IRQ2+PF7 30 DT0 31 TFS0 32 ERESET 43 IRQE+PF4 26 ELOUT 48 RFS0 33 ELIN 49 TFS1 38 DR0 34 DR1 40 ADSP-2187L TOP VIEW (Not to Scale) -30- REV. 0 ADSP-2187L The ADSP-2187L package pinout is shown in the table below. Pin names in bold text replace the plain text named functions when Mode C = 1. A + sign separates two functions when either function can be active for either major I/O mode. Signals enclosed in brackets [ ] are state bits latched from the value of the pin at the deassertion of RESET. TQFP Pin Configurations TQFP Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Pin Name A4/IAD3 A5/IAD4 GND A6/IAD5 A7/IAD6 A8/IAD7 A9/IAD8 A10/IAD9 A11/IAD10 A12/IAD11 A13/IAD12 GND CLKIN XTAL VDD CLKOUT GND VDD WR RD BMS DMS PMS IOMS CMS TQFP Number 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Pin Name IRQE + PF4 IRQL0 + PF5 GND IRQL1 + PF6 IRQ2 + PF7 DT0 TFS0 RFS0 DR0 SCLK0 VDD DT1 TFS1 RFS1 DR1 GND SCLK1 ERESET RESET EMS EE ECLK ELOUT ELIN EINT TQFP Number 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 Pin Name EBR BR EBG BG D0/IAD13 D1/IAD14 D2/IAD15 D3/IACK VDD GND D4/IS D5/IAL D6/IRD D7/IWR D8 GND VDD D9 D10 D11 GND D12 D13 D14 D15 TQFP Number 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Pin Name D16 D17 D18 D19 GND D20 D21 D22 D23 FL2 FL1 FL0 PF3 [Mode D] PF2 [Mode C] VDD PWD GND PF1 [Mode B] PF0 [Mode A] BGH PWDACK A0 A1/IAD0 A2/IAD1 A3/IAD2 REV. 0 -31- ADSP-2187L OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 100-Lead Metric Thin Plastic Quad Flatpack (TQFP) (ST-100) 0.640 (16.25) 0.630 (16.00) TYP SQ 0.620 (15.75) 0.555 (14.10) 0.551 (14.00) TYP SQ 0.547 (13.90) 100 1 76 75 0.063 (1.60) MAX 0.030 (0.75) 0.024 (0.60) TYP 0.020 (0.50) SEATING PLANE 12 TYP TOP VIEW (PINS DOWN) 0.004 (0.102) MAX LEAD COPLANARITY 0 -7 25 6 4 26 51 50 0.020 (0.50) 0.007 (0.177) BSC 0.005 (0.127) TYP 0.003 (0.077) LEAD PITCH* 0.011 (0.27) 0.009 (0.22) TYP 0.007 (0.17) LEAD WIDTH *THE ACTUAL POSITION OF EACH LEAD IS WITHIN 0.0032 (0.08) FROM ITS IDEAL POSITION WHEN MEASURED IN THE LATERAL DIRECTION. CENTER FIGURE ARE TYPICAL UNLESS OTHERWISE NOTED. ORDERING GUIDE Part Number ADSP-2187LKST-160 ADSP-2187LBST-160 ADSP-2187LKST-210 ADSP-2187LBST-210 Ambient Temperature Range 0C to +70C -40C to +85C 0C to +70C -40C to +85C Instruction Rate (MHz) 40 40 52 52 Package Description 100-Lead TQFP 100-Lead TQFP 100-Lead TQFP 100-Lead TQFP Package Option* ST-100 ST-100 ST-100 ST-100 *ST = Plastic Thin Quad Flatpack (TQFP). -32- REV. 0 PRINTED IN U.S.A. C3174-3-7/98 |
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