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dsp56f801/d rev. 7.0 , 1/2002 ? motorola, inc., 2002. all rights reserved. dsp56f80 1 preliminary technical data dsp56f801 16-bit digital signal processor ? up to 40 mips operation at 80 mhz core frequency ? dsp and mcu functionality in a unified, c-efficient architecture ? mcu-friendly instruction set supports both dsp and controller functions: mac, bit manipulation unit, 14 addressing modes ?8k 16-bit words program flash ?1k 16-bit words program ram ?2k 16-bit words data flash ?1k 16-bit words data ram ?2k 16-bit words boot flash ? hardware do and rep loops ? 6-channel pwm module ? two 4-channel, 12-bit adcs ? serial communications interface (sci) ? serial peripheral interface (spi) ? general purpose quad timer ?jtag/once tm port for debugging ? on-chip relaxation oscillator ?11 shared gpio ? 48-pin lqfp package figure 1. dsp56f801 block diagram jtag/ once port digital reg analog reg low voltage supervisor program controller and hardware looping unit data alu 16 x 16 + 36 ? 36-bit mac three 16-bit input registers two 36-bit accumulators address generation unit bit manipulation unit pll clock gen or optional internal relaxation osc. 16-bit dsp56800 core pab pdb xdb2 cgdb xab1 xab2 gpiob3/xtal gpiob2/exta l interrupt controls ipbb controls ipbus bridge (ipbb) module controls address bus [8:0] data bus [15:0] cop reset reset irqa application- specific memory & peripherals interrupt controller program memory 8188 x 16 flash 1024 x 16 sram boot flash 2048 x 16 flash data memory 2048 x 16 flash 1024 x 16 sram cop/ watchdog spi or gpio sci0 or gpio quad timer d or gpio quad timer c a/d1 a/d2 adc 4 2 3 4 4 6 pwm outputs fault input pwma 16 16 vcapc v dd v ss v dda v ssa 6 24 5* vref * includes tcs pin which is reserved for factory use and is tied to vss
2 dsp56f801 preliminary technical data motorola part 1 overview 1.1 dsp56f801 features 1.1.1 digital signal processing core ? efficient 16-bit dsp56800 family dsp engine with dual harvard architecture ? as many as 40 million instructions per second (mips) at 80 mhz core frequency ? single-cycle 16 16-bit parallel multiplier-accumulator (mac) ? two 36-bit accumulators including extension bits ? 16-bit bidirectional barrel shifter ? parallel instruction set with unique dsp addressing modes ? hardware do and rep loops ? three internal address buses and one external address bus ? four internal data buses and one external data bus ? instruction set supports both dsp and controller functions ? controller style addressing modes and instructions for compact code ? efficient c compiler and local variable support ? software subroutine and interrupt stack with depth limited only by memory ? jtag/once debug programming interface 1.1.2 memory ? harvard architecture permits as many as three simultaneous accesses to program and data memory ? on-chip memory including a low-cost, high-volume flash solution 8k 16 bit words of program flash 1k 16-bit words of program ram 2k 16-bit words of data flash 1k 16-bit words of data ram 2k 16-bit words of boot flash ? programmable boot flash supports customized boot code and field upgrades of stored code through a variety of interfaces (jtag, spi) 1.1.3 peripheral circuits for dsp56f801 ? pulse width modulator (pwm) with six pwm outputs, two fault inputs, fault-tolerant design with deadtime insertion; supports both center- and edge-aligned modes ? two 12-bit, analog-to-digital converters (adcs), which support two simultaneous conversions with two 4-multiplexed inputs; adc and pwm modules can be synchronized ? general purpose quad timer: timer d with three pins (or three additional gpio lines) ? serial communication interface (sci) with two pins (or two additional gpio lines)
dsp56f801 description motorola dsp56f801 preliminary technical data 3 ? serial peripheral interface (spi) with configurable four-pin port (or four additional gpio lines) ? eleven multiplexed general purpose i/o (gpio) pins ? computer-operating properly (cop) watchdog timer ? one dedicated external interrupt pin ? external reset pin for hardware reset ? jtag/on-chip emulation (once?) for unobtrusive, processor speed-independent debugging ? software-programmable, phase lock loop-based frequency synthesizer for the dsp core clock ? oscillator flexibility between either an external crystal oscillator or an on-chip relaxation oscillator for lower system cost and two additional gpio lines 1.1.4 energy information ? fabricated in high-density cmos with 5v tolerant, ttl-compatible digital inputs ? uses a single 3.3v power supply ? on-chip regulators for digital and analog circuitry to lower cost and reduce noise ? wait and stop modes available 1.2 dsp56f801 description the dsp56f801 is a member of the dsp56800 core-based family of digital signal processors (dsps). it combines, on a single chip, the processing power of a dsp and the functionality of a microcontroller with a flexible set of peripherals to create an extremely cost-effective solution. because of its low cost, configuration flexibility, and compact program code, the dsp56f801 is well-suited for many applications. the dsp56f801 includes many peripherals that are especially useful for applications such as motion control, smart appliances, steppers, encoders, tachometers, limit switches, power supply and control, automotive control, engine management, noise suppression, remote utility metering, and industrial control for power, lighting, and automation. the dsp56800 core is based on a harvard-style architecture consisting of three execution units operating in parallel, allowing as many as six operations per instruction cycle. the microprocessor-style programming model and optimized instruction set allow straightforward generation of efficient, compact code for both dsp and mcu applications. the instruction set is also highly efficient for c compilers to enable rapid development of optimized control applications. the dsp56f801 supports program execution from either internal or external memories. two data operands can be accessed from the on-chip data ram per instruction cycle. the dsp56f801 also provides one external dedicated interrupt lines and up to 11 general purpose input/output (gpio) lines, depending on peripheral configuration. the dsp56f801 dsp controller includes 8k words (16-bit) of program flash and 2k words of data flash (each programmable through the jtag port) with 1k words of both program and data ram. a total of 2k words of boot flash is incorporated for easy customer-inclusion of field-programmable software routines that can be used to program the main program and data flash memory areas. both program and data flash memories can be independently bulk erased or erased in page sizes of 256 words. the boot flash memory can also be either bulk or page erased. a key application-specific feature of the dsp56f801 is the inclusion of a pulse width modulator (pwm) module. this modules incorporates six complementary, individually programmable pwm signal outputs to
4 dsp56f801 preliminary technical data motorola enhance motor control functionality. complementary operation permits programmable dead-time insertion, and separate top and bottom output polarity control. the up-counter value is programmable to support a continuously variable pwm frequency. both edge and center aligned synchronous pulse width control (0% to 100% modulation) are supported. the device is capable of controlling most motor types: acim (ac induction motors), both bdc and bldc (brush and brushless dc motors), srm and vrm (switched and variable reluctance motors), and stepper motors. the pwms incorporate fault protection and cycle-by- cycle current limiting with sufficient output drive capability to directly drive standard opto-isolators. a smoke-inhibit, write-once protection feature for key parameters is also included. the pwm is double- buffered and includes interrupt control to permit integral reload rates to be programmable from 1 to 16. the pwm modules provide a reference output to synchronize the analog-to-digital converters. the dsp56f801 incorporates an 8 input, 12-bit analog-to-digital converter (adc). a full set of standard programmable peripherals is provided that include a serial communications interface (sci), a serial peripheral interface (spi), and two quad timers. any of these interfaces can be used as general-purpose input/outputs (gpio) if that function is not required. an on-chip relaxation oscillator provides flexibility in the choice of either on-chip or externally supplied frequency reference for chip timing operations. application code is used to select which source is to be used. 1.3 best in class development environment the sdk (software development kit) provides fully debugged peripheral drivers, libraries and interfaces that allow programmers to create their unique c application code independent of component architecture. the codewarrior integrated development environment is a sophisticated tool for code navigation, compiling, and debugging. a complete set of evaluation modules (evms) and development system cards support concurrent engineering. together, the sdk, codewarrior, and evms create a complete, scalable tools solution for easy, fast, and efficient development. 1.4 product documentation the four documents listed in table 1 are required for a complete description and proper design with the dsp56f801. documentation is available from local motorola distributors, motorola semiconductor sales offices, motorola literature distribution centers, or online at www.motorola.com/semiconductors/dsp . table 1. dsp56f801 chip documentation topic description order number dsp56800 family manual detailed description of the dsp56800 family architecture, and 16-bit dsp core processor and the instruction set dsp56800fm/d dsp56f801/803/805/807 users manual detailed description of memory, peripherals, and interfaces of the dsp56f801, dsp56f803, dsp56f805, and dsp56f807 DSP56F801-7UM/d dsp56f801 technical data sheet electrical and timing specifications, pin descriptions, and package descriptions (this document) dsp56f801/d dsp56f801 product brief summary description and block diagram of the dsp56f801 core, memory, peripherals and interfaces dsp56f801pb/d
data sheet conventions motorola dsp56f801 preliminary technical data 5 1.5 data sheet conventions this data sheet uses the following conventions: part 2 signal/connection descriptions 2.1 introduction the input and output signals of the dsp56f801 are organized into functional groups, as shown in table 2 and as illustrated in figure 2 . in table 3 through table 13 , each table row describes the signal or signals present on a pin. overbar this is used to indicate a signal that is active when pulled low. for example, the reset pin is active when low. asserted a high true (active high) signal is high or a low true (active low) signal is low. deasserted a high true (active high) signal is low or a low true (active low) signal is high. examples: signal/symbol logic state signal state voltage 1 1. values for vil, vol, vih, and voh are defined by individual product specifications. pin true asserted v il /v ol pin false deasserted v ih /v oh pin true asserted v ih /v oh pin false deasserted v il /v ol table 2. functional group pin allocations functional group number of pins detailed description power (v dd or v dda )5 table 3 ground (v ss or v ssa )6 table 4 supply capacitors 2 table 5 pll and clock 2 table 6 interrupt and program control 2 table 7 pulse width modulator (pwm) port 7 table 8 serial peripheral interface (spi) port 1 1. alternately, gpio pins 4 table 9 serial communications interface (sci) port 1 2 table 10 analog-to-digital converter (adc) port 9 table 11 quad timer module port 3 table 12 jtag/on-chip emulation (once) 6 table 13
6 dsp56f801 preliminary technical data motorola figure 2. dsp56f801 signals identified by functional group 1 1. alternate pin functionality is shown in parenthesis. dsp56f801 power port ground port power port ground port pll and clock or gpio sci0 port or gpio v dd v ss v dda v ssa vcapc extal (gpiob2) xtal (gpiob3) tck tms tdi tdo trst de jtag/once ? port pwma0-5 faulta0 sclk (gpiob4) mosi (gpiob5) miso (gpiob6) ss (gpiob7) txd0 (gpiob0) rxd0 (gpiob1) ana0-7 vref td0-2 (gpioa0-2) irqa reset quad timer d or gpio adca port other supply port 4 5* 1 1 2 1 1 1 1 1 1 1 1 interrupt/ program control 6 1 1 1 1 1 1 1 8 1 3 1 1 spi port or gpio * includes tcs pin which is reserved for factory use and is tied to vss
power and ground signals motorola dsp56f801 preliminary technical data 7 2.2 power and ground signals 2.3 clock and phase lock loop signals table 3. power inputs no. of pins signal name signal description 4 v dd power these pins provide power to the internal structures of the chip, and should all be attached to v dd. 1 v dda analog power these pins supply an analog power source. table 4. grounds no. of pins signal name signal description 4 v ss gnd these pins provide grounding for the internal structures of the chip, and should all be attached to v ss. 1 v ssa analog ground this pin supplies an analog ground. 1 tcs tcs this pin is reserved for factory use and must be tied to v ss for normal use. in block diagrams, this pin is considered an additional v ss. table 5. supply capacitors and vpp no. of pins signal name signal type state during reset signal description 2 vcapc supply supply vcapc - connect each pin to a 2.2 m f bypass capacitor in order to bypass the core logic voltage regulator (required for proper chip operation). for more information, refer to section 5.2 . table 6. pll and clock no. of pins signal name signal type state during reset signal description 1 extal gpiob2 input input/ output input input external crystal oscillator input this input should be connected to an 8 mhz external crystal or ceramic resonator. for more information, please refer to section 3.5 . port b gpio this multiplexed pin is a general purpose i/o (gpio) pin that can be programmed as an input or output pin. this i/o can be utilized when using the on-chip relaxation oscillator so the extal pin is not needed. * includes tcs pin which is reserved for factory use and is tied to vss
8 dsp56f801 preliminary technical data motorola 2.4 interrupt and program control signals 2.5 pulse width modulator (pwm) signals 1 xtal gpiob3 output input/ output chip- driven input crystal oscillator output this output should be connected to an 8 mhz external crystal or ceramic resonator. for more information, please refer to section 3.5 . this pin can also be connected to an external clock source. for more information, please refer to section 3.5.3 . port b gpio this multiplexed pin is a general purpose i/o (gpio) pin that can be programmed as an input or output pin. this i/o can be utilized when using the on-chip relaxation oscillator so the xtal pin is not needed. table 7. interrupt and program control signals no. of pins signal name signal type state during reset signal description 1 irqa input input external interrupt request a the irqa input is a synchronized external interrupt request that indicates that an external device is requesting service. it can be programmed to be level-sensitive or negative-edge- triggered. 1 reset input input reset this input is a direct hardware reset on the processor. when reset is asserted low, the dsp is initialized and placed in the reset state. a schmitt trigger input is used for noise immunity. when the reset pin is deasserted, the initial chip operating mode is latched from the extboot pin. the internal reset signal will be deasserted synchronous with the internal clocks, after a fixed number of internal clocks. to ensure complete hardware reset, reset and trst should be asserted together. the only exception occurs in a debugging environment when a hardware dsp reset is required and it is necessary not to reset the once/jtag module. in this case, assert reset , but do not assert trst . table 8. pulse width modulator (pwma) signals no. of pins signal name signal type state during reset signal description 6 pwma0-5 output tri- stated pwma0-5 these are six pwma output pins. 1 faulta0 input input faulta0 this fault input pin is used for disabling selected pwma outputs in cases where fault conditions originate off chip. table 6. pll and clock (continued) no. of pins signal name signal type state during reset signal description
serial peripheral interface (spi) signals motorola dsp56f801 preliminary technical data 9 2.6 serial peripheral interface (spi) signals table 9. serial peripheral interface (spi) signals no. of pins signal name signal type state during reset signal description 1 miso gpiob6 input/ output input/ output input input spi master in/slave out (miso) this serial data pin is an input to a master device and an output from a slave device. the miso line of a slave device is placed in the high- impedance state if the slave device is not selected. port e gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is miso. 1 mosi gpiob5 input/ output input/ output input input spi master out/slave in (mosi) this serial data pin is an output from a master device and an input to a slave device. the master device places data on the mosi line a half-cycle before the clock edge that the slave device uses to latch the data. port e gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is mosi. 1 sclk gpiob4 input/ output input/ output input input spi serial clock in master mode, this pin serves as an output, clocking slaved listeners. in slave mode, this pin serves as the data clock input. port e gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is sclk. 1 ss gpiob7 input input/ output input input spi slave select in master mode, this pin is used to arbitrate multiple masters. in slave mode, this pin is used to select the slave. port e gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is ss .
10 dsp56f801 preliminary technical data motorola 2.7 serial communications interface (sci) signals 2.8 analog-to-digital converter (adc) signals 2.9 quad timer module signals table 10. serial communications interface (sci0) signals no. of pins signal name signal type state during reset signal description 1 txd0 gpiob0 output input/ output input input transmit data (txd0) transmit data output port b gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is sci output. 1 rxd0 gpiob1 input input/ output input input receive data (rxd0) receive data input port b gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as an input or output pin. after reset, the default state is sci input. table 11. analog to digital converter signals no. of pins signal name signal type state during reset signal description 4 ana0-3 input input ana0-3 analog inputs to adc channel 1 4 ana4-7 input input ana4-7 analog inputs to adc channel 2 1 vref input input vref analog reference voltage for adc. must be set to v dda -0.3v for optimal performance. table 12. quad timer module signals no. of pins signal name signal type state during reset signal description 3 td0-2 gpioa0-2 input/ output input/ output input input td0-2 timer d channel 0-2 port a gpio this pin is a general purpose i/o (gpio) pin that can individually be programmed as input or output pin. after reset, the default state is the quad timer input.
jtag/once motorola dsp56f801 preliminary technical data 11 2.10 jtag/once table 13. jtag/on-chip emulation (once) signals no. of pins signal name signal type state during reset signal description 1 tck input input, pulled low internally test clock input this input pin provides a gated clock to synchronize the test logic and shift serial data to the jtag/once port. the pin is connected internally to a pull-down resistor. 1 tms input input, pulled high internally test mode select input this input pin is used to sequence the jtag tap controllers state machine. it is sampled on the rising edge of tck and has an on-chip pull-up resistor. 1 tdi input input, pulled high internally test data input this input pin provides a serial input data stream to the jtag/once port. it is sampled on the rising edge of tck and has an on-chip pull-up resistor. 1 tdo output tri-stated test data output this tri-statable output pin provides a serial output data stream from the jtag/once port. it is driven in the shift-ir and shift-dr controller states, and changes on the falling edge of tck. 1 trst input input, pulled high internally test reset as an input, a low signal on this pin provides a reset signal to the jtag tap controller. to ensure complete hardware reset, trst should be asserted whenever reset is asserted. the only exception occurs in a debugging environment when a hardware dsp reset is required and it is necessary not to reset the once/jtag module. in this case, assert reset , but do not assert trst . 1 de output output debug event de provides a low pulse on recognized debug events.
12 dsp56f801 preliminary technical data motorola part 3 specifications 3.1 general characteristics the dsp56f801 is fabricated in high-density cmos with 5-volt tolerant ttl-compatible digital inputs. the term 5-volt tolerant refers to the capability of an i/o pin, built on a 3.3v compatible process technology, to withstand a voltage up to 5.5v without damaging the device. many systems have a mixture of devices designed for 3.3v and 5v power supplies. in such systems, a bus may carry both 3.3v and 5v- compatible i/o voltage levels (a standard 3.3v i/o is designed to receive a maximum voltage of 3.3v 10% during normal operation without causing damage). this 5v tolerant capability therefore offers the power savings of 3.3v i/o levels while being able to receive 5v levels without being damaged. absolute maximum ratings given in table 14 are stress ratings only, and functional operation at the maximum is not guaranteed. stress beyond these ratings may affect device reliability or cause permanent damage to the device. the dsp56f801 dc and ac electrical specifications are preliminary and are from design simulations. these specifications may not be fully tested or guaranteed at this early stage of the product life cycle. finalized specifications will be published after complete characterization and device qualifications have been completed. caution this device contains protective circuitry to guard against damage due to high static voltage or electrical fields. however, normal precautions are advised to avoid application of any voltages higher than maximum rated voltages to this high-impedance circuit. reliability of operation is enhanced if unused inputs are tied to an appropriate voltage level. table 14. absolute maximum ratings characteristic symbol min max unit supply voltage v dd v ss C 0.3 v ss + 4.0 v all other input voltages, excluding analog inputs v in v ss C 0.3 v ss + 5.5v v analog inputs ana0-7 and vref v in v ssa C 0.3 v dda + 0.3 v analog inputs extal, xtal v in v ssa C 0.3 v ssa + 3.0 v current drain per pin excluding v dd , v ss , & pwm ouputs i 10 ma current drain per pin for pwm outputs i 20 ma junction temperature t j 150c storage temperature range t stg -55 150 c
dc electrical characteristics motorola dsp56f801 preliminary technical data 13 3.2 dc electrical characteristics table 15. recommended operating conditions characteristic symbol min max unit supply voltage v dd, v dda 3.0 3.6 v ambient operating temperature t a -40 85 c table 16. thermal characteristics 1 1. see section 5.1 for more detail. characteristic 48-pin lqfp symbol value unit thermal resistance junction-to-ambient (estimated) q ja 46.8 c/w i/o pin power dissipation p i/o user determined w power dissipation p d p d = (i dd x v dd ) + p i/o w maximum allowed p d p dmax (t j - t a ) / q ja c table 17. dc electrical characteristics operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz characteristic symbol min typ max unit input high voltage (xtal/extal) v ihc 2.25 2.5 2.75 v input low voltage (xtal/extal) v ilc 0 0.5 v input high voltage v ih 2.0 5.5 v input low voltage v il -0.3 0.8 v input current low (pullups/pulldowns disabled) i il -1 1 m a input current high (pullups/pulldowns disabled) i ih -1 1 m a typical pullup or pulldown resistance r pu , r pd 30k w input/output tri-state current low i ozl -10 10 m a input/output tri-state current low i ozh -10 10 m a output high voltage (at ioh) v oh v dd C 0.7 v output low voltage (at iol) v ol 0.4v output high current i oh -4ma output low current i ol 4ma
14 dsp56f801 preliminary technical data motorola input capacitance c in 8pf output capacitance c out 12pf pwm pin output source current 1 i ohp -10 ma pwm pin output sink current 2 i olp 16ma v dd supply current i ddt 3 run 4 103 138 ma wait 5 7298ma stop 71 97 ma low voltage interrupt 6 v ei 2.4 2.7 2.9 v power on reset 7 v por 1.72.0v 1. pwm pin output source current measured with 50% duty cycle. 2. pwm pin output sink current measured with 50% duty cycle. 3. i ddt = i dd + i dda (total supply current for vdd + vdda) 4. run (operating) i dd measured using 8mhz clock source. all inputs 0.2v from rail; outputs unloaded. all ports configured as inputs; measured with all modules enabled. 5. wait i dd measured using external square wave clock source (f osc = 8 mhz) into xtal; all inputs 0.2v from rail; no dc loads; less than 50 pf on all outputs. c l = 20 pf on extal; all ports configured as inputs; extal capacitance linearly affects wait i dd ; measured with pll enabled. 6. low voltage interrupt monitors the v dd supply. when v dd drops below v ei value, an interrupt is generated. functionality of the device is guaranteed under transient conditions when v dda > v ei . 7. power C on reset occurs whenever the internally regulated 2.5v digital supply drops below 1.5v typical. while power is ramping up, this signal remains active for as long as the internal 2.5v is below 1.5v typical no matter how long the ramp up rate is. the internally regulated voltage is typically 100 mv less than v dd during ramp up until 2.5v is reached, at which time it self regulates. table 17. dc electrical characteristics (continued) operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz characteristic symbol min typ max unit
ac electrical characteristics motorola dsp56f801 preliminary technical data 15 figure 3. maximum run idd vs. frequency (see note 4 above) 3.3 ac electrical characteristics timing waveforms in section 3.3 are tested with a v il maximum of 0.8v and a v ih minimum of 2.0v for all pins except xtal, which is tested using the input levels in section 3.2 . in figure 4 the levels of v ih and v il for an input signal are shown. figure 4. input signal measurement references figure 5 shows the definitions of the following signal states: ? active state, when a bus or signal is driven, and enters a low impedance state. ? tri-stated, when a bus or signal is placed in a high impedance state. ? data valid state, when a signal level has reached v ol or v oh. ? data invalid state, when a signal level is in transition between v ol and v oh. 180 150 120 90 60 30 0 idd (ma) digital (vdd=3.6v) analog (vdda=3.6v) total freq. (mhz) 0 40 60 80 20 v ih v il fall time input signal note: the midpoint is v il + (v ih C v il )/2. midpoint1 low high 90% 50% 10% rise time
16 dsp56f801 preliminary technical data motorola 3.4 flash memory characteristics figure 5. signal states table 18. flash memory truth table mode xe 1 1. x address enable, all rows are disabled when xe = 0 ye 2 2. y address enable, ymux is disabled when ye = 0 se 3 3. sense amplifier enable oe 4 4. output enable, tri-state flash data out bus when oe = 0 prog 5 5. defines program cycle erase 6 6. defines erase cycle mas1 7 7. defines mass erase cycle, erase whole block nvstr 8 8. defines non-volatile store cycle standby l l l l l l l l read h h h h l l l l word program h h l l h l l h page erase h l l l l h l h mass erase h l l l l h h h table 19. ifren truth table mode ifren = 1 ifren = 0 read read information block read main memory block word program program information block program main memory block page erase erase information block erase main memory block mass erase erase both block erase main memory block data invalid state data1 data2 valid data tri-stated data3 valid data2 data3 data1 valid data active data active
flash memory characteristics motorola dsp56f801 preliminary technical data 17 table 20. timing symbols characteristic symbol see figure(s) prog/erase to nvstr set up time t nvs figure 6 , figure 7 , figure 8 nvstr hold time t nvh figure 6 , figure 7 nvstr hold time(mass erase) t nvh1 figure 8 nvstr to program set up time t pgs figure 6 program hold time t pgh figure 6 address/data set up time t ads figure 6 address/data hold time t adh figure 6 recovery time t rcv figure 6 , figure 7 , figure 8 cumulative program hv period t hv figure 6 program time t prog figure 6 erase time t erase figure 7 mass erase time t me figure 8 table 21. flash timing parameters operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf characteristic symbol min typ max unit program time t prog 20 CCus erase time t erase 20 C C ms mass erase time t me 100 C C ms endurance 1 e cyc 10,000 20,000 C cycles data retention 1 @ 5000 cycles d ret 10 30 C years prog/erase to nvstr set up time t nvs C5 Cus the following parameters should only be used in the manual word programming mode nvstr hold time t nvh C5 Cus nvstr hold time (mass erase) t nvh1 C100 C us nvstr to program set up time t pgs C10 Cus
18 dsp56f801 preliminary technical data motorola figure 6. flash program cycle recovery time t rcv C1 Cus cumulative program hv period 2 t hv C3 Cms 1. program specification guaranteed from t a = 0 c to 85 c. 2. thv is the cumulative high voltage programming time to the same row before next erase. the same address cannot be programmed twice before next erase. table 21. flash timing parameters (continued) operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf characteristic symbol min typ max unit xadr yadr ye din prog nvstr tnvs tpgs tadh tprog tads tpgh tnvh trcv thv ifren xe
flash memory characteristics motorola dsp56f801 preliminary technical data 19 figure 7. flash erase cycle figure 8. flash mass erase cycle xadr ye=se=oe=mas1=0 erase nvstr tnvs tnvh trcv terase ifren xe xadr ye=se=oe=0 erase nvstr tnvs tnvh1 trcv tme mas1 ifren xe
20 dsp56f801 preliminary technical data motorola 3.5 external clock operation the dsp56f801 device clock is derived from either 1) an internal crystal oscillator circuit working in conjunction with an external crystal, 2) an external frequency source, or 3) an on-chip relaxation oscillator. to generate a reference frequency using the internal crystal oscillator circuit, a reference crystal external to the chip must be connected between the extal and xtal pins. paragrahs 3.5.1 and 3.5.4 describe these methods of clocking. whichever type of clock derivation is used provides a reference signal to a phase- locked loop (pll) within the dsp56f801. in turn, the pll generates a master reference frequency that determines the speed at which chip operations occur. application code can be set to change the frequency source between the relaxation oscillator and crystal oscillator or external source, and power down the relaxation oscillator if desired. selection of which clock is used is determined by setting the precs bit in the pllcr (phase-locked loop control register) word (bit 2). if the bit is set to 1, the external crystal oscillator circuit is selected. if the bit is set to 0, the internal relaxation oscillator is selected, and this is the default value of the bit when power is first applied. 3.5.1 crystal oscillator the internal crystal oscillator circuit is designed to interface with a parallel-resonant crystal resonator in the frequency range specified for the external crystal, which is 4-8+ mhz. figure 9 shows a typical crystal oscillator circuit. follow the crystal suppliers recommendations when selecting a crystal, since crystal parameters determine the component values required to provide maximum stability and reliable start-up. the crystal and associated components should be mounted as close as possible to the extal and xtal pins to minimize output distortion and start-up stabilization time. figure 9. external crystal oscillator circuit 3.5.2 ceramic resonator it is also possible to drive the internal oscillator with a ceramic resonator, assuming the overall system design can tolerate the reduced signal integrity. in figure 10 , a typical ceramic resonator circuit is shown. refer to suppliers recommendations when selecting a ceramic resonator and associated components. the resonator and components should be mounted as close as possible to the extal and xtal pins. figure 10. connecting a ceramic resonator sample external crystal parameters: r z = 10 m w f c = 4-8 mhz (optimized for 8 mhz) extal xtal r z f c sample ceramic resonator parameters r z = 10 m w f c = 4-8 mhz (optimized for 8 mhz) extal xtal r z f c
external clock operation motorola dsp56f801 preliminary technical data 21 3.5.3 external clock source the recommended method of connecting an external clock is given in figure 11 . the external clock source is connected to xtal and the extal pin is grounded. figure 11. connecting an external clock signal figure 12. external clock timing table 22. external clock operation timing requirements 5 operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c characteristic symbol min typ max unit frequency of operation (external clock driver) 1 1. see figure 11 for details on using the recommended connection of an external clock driver. f osc 08110mhz clock pulse width 2 , 5 2. the high or low pulse width must be no smaller than 6.25 ns or the chip will not function. t pw 6.25 ns external clock input rise time 3 , 5 3. external clock input rise time is measured from 10% to 90%. t rise 3ns external clock input fall time 4 , 5 4. external clock input fall time is measured from 90% to 10%. 5. parameters listed are guaranteed by design. t fall 3ns dsp56f801 xtal extal external v ss clock external clock v ih v il note: the midpoint is v il + (v ih C v il )/2. 90% 50% 10% 90% 50% 10% t fall t rise t pw t pw
22 dsp56f801 preliminary technical data motorola 3.5.4 use of on-chip relaxation oscillator an internal relaxation oscillator can supply the reference frequency when an external frequency source or crystal are not used. during a dsp56f801 boot or reset sequence, the relaxation oscillator is enabled by default, and the precs bit in the pllcr word is set to 0 ( section 3.5 ). if an external oscillator is connected, the relaxation oscillator can be deselected instead by setting the precs bit in the pllcr to 1. when this occurs, the precss bit in the pllsr (prescaler clock select status register) data word also sets to 1. if a changeover between internal and external oscillators is required at startup, internal device circuits compensate for any asynchronous transitions between the two clock signals so that no glitches occur in the resulting master clock to the chip. when changing clocks, the user must ensure that the clock source is not switched until the desired clock is enabled and stable. to compensate for variances in the device manufacturing process, the accuracy of the relaxation oscillator can be incrementally adjusted to within 0. 25% of 8 mhz by trimming an internal capacitor. bits 0-7 of the iosctl (internal oscillator control) word allow the user to set in an additional offset (trim) to this preset value to increase or decrease capacitance. the default value of this trim is 128 units, making the power-up default capacitor size 432 units. each unit added or deleted changes the output frequency by about 0.23%, allowing incremental adjustment until the desired frequency accuracy is achieved. table 23. pll timing operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c characteristic symbol min typ max unit external reference crystal frequency for the pll 1 1. an externally supplied reference clock should be as free as possible from any phase jitter for the pll to work correctly. the pll is optimized for 8 mhz input crystal. 2. zclk may not exceed 80 mhz. for additional information on zclk and f out /2, please refer to the occs chapter in the user manual. 3. this is the minimum time required after the pll setup is changed to ensure reliable operation. f osc 6810mhz pll output frequency 2 (f out /2) f op 40 80mhz pll stabilization time 3 0 o to +85 o c t plls 10ms pll stabilization time 3 -40 o to 0 o c t plls 100 200 ms table 24. relaxation oscillator characteristics operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c characteristic symbol min typ max unit frequency accuracy 1 1. over full temperature range. d f + 2+ 5% frequency drift over temp f t 789mhz frequency drift over supply d f/ d t+ 0.1 %/ o c trim range d f/ d t 0.1 %/v trim accuracy d f t + 0.25 %
external clock operation motorola dsp56f801 preliminary technical data 23 figure 13. typical relaxation oscillator frequency vs. temperature (trimmed to 8mhz @ 25 o c) figure 14. typical relaxation oscillator frequency vs. trim value @ 25 o c 8.0 7.8 8.1 8.2 7.7 7.9 7.6 75 55 -40 35 -25 15 -5 85 temperature ( o c) output frequency 0 102030405060708090a0b0c0d0e0f0 5 6 7 8 9 10 11
24 dsp56f801 preliminary technical data motorola 3.6 reset, stop, wait, mode select, and interrupt timing table 25. reset, stop, wait, mode select, and interrupt timing 1, 5 operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf 1. in the formulas, t = clock cycle. for an operating frequency of 80 mhz, t = 12.5 ns. characteristic symbol typical min typical max unit see reset assertion to address, data and control signals high impedance t raz 21ns figure 15 minimum reset assertion duration 2 omr bit 6 = 0 omr bit 6 = 1 2. circuit stabilization delay is required during reset when using an external clock or crystal oscillator in two cases: ? after power-on reset ? when recovering from stop state t ra 275,000t 128t ns ns figure 15 reset de-assertion to first external address output t rda 33t 34t ns figure 15 edge-sensitive interrupt request width t irw 1.5t ns figure 16 irqa , irqb assertion to external data memory access out valid, caused by first instruction execution in the interrupt service routine t idm 15tns figure 17 irqa , irqb assertion to general purpose output valid, caused by first instruction execution in the interrupt service routine t ig 16tns figure 17 irqa low to first valid interrupt vector address out recovery from wait state 3 3. the minimum is specified for the duration of an edge-sensitive irqa interrupt required to recover from the stop state. this is not the minimum required so that the irqa interrupt is accepted. t iri 13tns figure 18 irqa width assertion to recover from stop state 4 4. the interrupt instruction fetch is visible on the pins only in mode 3. 5. parameters listed are guaranteed by design. t iw 2tns figure 19 delay from irqa assertion to fetch of first instruction (exiting stop) omr bit 6 = 0 omr bit 6 = 1 t if 275,000t 12t ns ns figure 19 duration for level sensitive irqa assertion to cause the fetch of first irqa interrupt instruction (exiting stop) omr bit 6 = 0 omr bit 6 = 1 t irq 275,000t 12t ns ns figure 20 delay from level sensitive irqa assertion to first interrupt vector address out valid (exiting stop) omr bit 6 = 0 omr bit 6 = 1 t ii 275,000t 12t ns ns figure 20
reset, stop, wait, mode select, and interrupt timing motorola dsp56f801 preliminary technical data 25 figure 15. asynchronous reset timing figure 16. external interrupt timing (negative-edge-sensitive) figure 17. external level-sensitive interrupt timing first fetch a0Ca15, d0Cd15 ps , ds , rd , wr reset first fetch t raz t ra t rda irqa , irqb t irw a0Ca15, ps , ds , rd , wr irqa , irqb first interrupt instruction execution a) first interrupt instruction execution general purpose i/o pin irqa , irqb b) general purpose i/o t idm t ig
26 dsp56f801 preliminary technical data motorola figure 18. interrupt from wait state timing figure 19. recovery from stop state using asynchronous interrupt timing figure 20. recovery from stop state using irqa interrupt service instruction fetch irqa , irqb first interrupt vector a0Ca15, ps , ds , rd , wr t iri not irqa interrupt vector irqa a0Ca15, ps , ds , rd , wr first instruction fetch t iw t if instruction fetch irqa a0Ca15 ps , ds , rd , wr first irqa interrupt t irq t ii
serial peripheral interface (spi) timing motorola dsp56f801 preliminary technical data 27 3.7 serial peripheral interface (spi) timing 1. parameters listed are guaranteed by design. table 26. spi timing 1 operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80mhz characteristic symbol min max unit see figure cycle time master slave t c 50 25 ns ns figures 21 , 22 , 23 , 24 enable lead time master slave t eld 25 ns ns figure 24 enable lag time master slave t elg 100 ns ns figure 24 clock (sck) high time master slave t ch 17.6 12.5 ns ns figures 21 , 22 , 23 , 24 clock (sck) low time master slave t cl 24.1 25 ns ns figures 21 , 22 , 23 , 24 data setup time required for inputs master slave t ds 20 0 ns ns figures 21 , 22 , 23 , 24 data hold time required for inputs master slave t dh 0 2 ns ns figures 21 , 22 , 23 , 24 access time (time to data active from high- impedance state) slave t a 4.8 15 ns figure 24 disable time (hold time to high-impedance state) slave t d 3.7 15.2 ns figure 24 data valid for outputs master slave (after enable edge) t dv 4.5 20.4 ns ns figures 21 , 22 , 23 , 24 data invalid master slave t di 0 0 ns ns figures 21 , 22 , 23 , 24 rise time master slave t r 11.5 10.0 ns ns figures 21 , 22 , 23 , 24 fall time master slave t f 9.7 9.0 ns ns figures 21 , 22 , 23 , 24
28 dsp56f801 preliminary technical data motorola figure 21. spi master timing (cpha = 0) figure 22. spi master timing (cpha = 1) sclk (cpol = 0) (output) sclk (cpol = 1) (output) miso (input) mosi (output) msb in bits 14C1 lsb in master msb out bits 14C1 master lsb out ss (input) ss is held high on master t f t r t di (ref) t dv t di t ds t dh t ch t cl t ch t f t f t r t r t cl t c sclk (cpol = 0) (output) sclk (cpol = 1) (output) miso (input) mosi (output) msb in bits 14C1 lsb in master msb out bits 14C 1 master lsb out ss (input) ss is held high on master t c t cl t cl t ch t ch t f t f t r t r t ds t dh t dv t di t r t f t dv (ref)
serial peripheral interface (spi) timing motorola dsp56f801 preliminary technical data 29 figure 23. spi slave timing (cpha = 0) figure 24. spi slave timing (cpha = 1) sclk (cpol = 0) (input) sclk (cpol = 1) (input) miso (output) mosi (input) slave msb out bits 14C1 msb in bits 14C1 lsb in ss (input) slave lsb out t c t cl t f t elg t r t ds t eld t ch t cl t a t ch t r t f t d t di t dv t dh t di sclk (cpol = 0) (input) sclk (cpol = 1) (input) miso (output) mosi (input) slave msb out bits 14C1 msb in bits 14C1 lsb in ss (input) slave lsb out t di t d t r t dv t dh t f t ds t elg t f t r t ch t dv t a t eld t cl t cl t ch t c
30 dsp56f801 preliminary technical data motorola 3.8 quad timer timing 3.9 serial communication interface (sci) timing table 27. timer timing 1, 2 operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz 1. in the formulas listed, t = clock cycle. for 80 mhz operation, t = 12.5 ns. 2. parameters listed are guaranteed by design. characteristic symbol typical min typical max unit timer input period p in 4t+6 ns timer input high/low period p inhl 2t+3 ns timer output period p out 2t ns timer output high/low period p outhl 1t ns figure 25. timer timing table 28. sci timing operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz characteristic symbol min max unit baud rate 1 1. f max is the frequency of operation of the system clock in mhz. br (f max *2.5)/(80) mbps rxd 2 pulse width 2. the rxd pin in sci0 is named rxd0 and the rxd pin in sci1 is named rxd1. rxd pw 0.965/br 1.04/br ns txd 3 pulse width 3. the txd pin in sci0 is named txd0 and the txd pin in sci1 is named txd1. 4. parameters listed are guaranteed by design. txd pw 0.965/br 1.04/br ns timer inputs timer outputs p outhl p outhl p out p in p inhl p inhl
analog-to-digital converter (adc) characteristics motorola dsp56f801 preliminary technical data 31 figure 26. rxd pulse width figure 27. txd pulse width 3.10 analog-to-digital converter (adc) characteristics table 29. adc characteristics operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, v ref = v dd -0.3v, adcdiv = 4, 9, or 14, adc clock = 4mhz, 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz characteristic symbol min typ max unit input voltages v adin 0 v dda 1 v resolution r es 12 12 bits integral non-linearity 2 inl +/- 4 +/- 5 lsb 3 differential non-linearity dnl +/- 0.9 +/- 1 lsb 3 monotonicity guaranteed adc internal clock f adic 0.5 5 mhz conversion range r ad v ssa v dda v conversion time t adc 6 t aic cycles 4 sample time t ads 1 t aic cycles 4 input capacitance c adi 5 pf 4 gain error (transfer gain) e gain 1.00 1.10 1.15 offset voltage v offset +10 +230 +325 mv total harmonic distortion thd 55 60 db signal-to-noise plus distortion sinad 54 56 db effective number of bits enob 8.5 9.5 bit spurious free dynamic range sfdr 60 65 db rxd sci receive data pin (input) rxd pw txd sci receive data pin (input) txd pw
32 dsp56f801 preliminary technical data motorola figure 28. equivalent analog input circuit 1. parasitic capacitance due to package, pin to pin, and pin to package base coupling. 1.8pf 2. parasitic capacitance due to the chip bond pad, esd protection devices and signal routing. 2.04pf 3. equivalent resistance for the esd isolation resistor and the channel select mux. 500 ohms sampling capacitor at the sample and hold circuit. capacitor 4 is normally disconnected from the input and is only connected to it at sampling time. 1pf bandwidth bw 100 khz adc quiescent current (both adcs) i adc 39.3 ma v ref quiescent current (both adcs) i vref 11.85 14.5 ma 1. v dda should be tied to the same potential as v dd via separate traces. v ref must be equal to or less than v dd and must be greater than or equal to 2.7v. 2. measured in 10-90% range. 3. lsb = least significant bit. table 29. adc characteristics (continued) operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, v ref = v dd -0.3v, adcdiv = 4, 9, or 14, adc clock = 4mhz, 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz characteristic symbol min typ max unit 1 2 3 4 adc analog input
jtag timing motorola dsp56f801 preliminary technical data 33 3.11 jtag timing table 30. jtag timing 1, 3 operating conditions: v ss = v ssa = 0 v, v dd = v dda = 3.0C3.6 v, t a = C40 to +85 c, c l 50 pf, f op = 80 mhz 1. timing is both wait state and frequency dependent. for the values listed, t = clock cycle. for 80 mhz operation, t = 12.5 ns. characteristic symbol min max unit tck frequency of operation 2 2. tck frequency of operation must be less than 1/8 the processor rate. 3. parameters listed are guaranteed by design. f op dc 10 mhz tck cycle time t cy 100 ns tck clock pulse width t pw 50 ns tms, tdi data setup time t ds 0.4 ns tms, tdi data hold time t dh 1.2 ns tck low to tdo data valid t dv 26.6 ns tck low to tdo tri-state t ts 23.5 ns trst assertion time t trst 50 ns de assertion time t de 8t ns figure 29. test clock input timing diagram tck (input) v m v il v m = v il + (v ih C v il )/2 v m v ih t pw t pw t cy
34 dsp56f801 preliminary technical data motorola figure 30. test access port timing diagram figure 31. trst timing diagram figure 32. oncedebug event input data valid output data valid output data valid tck (input) tdi (input) tdo (output) tdo (output ) tdo (output) tms t dv t dv t ts t ds t dh trst (input) t trst de t de
package and pin-out information dsp56f801 motorola dsp56f801 preliminary technical data 35 part 4 packaging 4.1 package and pin-out information dsp56f801 this section contains package and pin-out information for the 48-pin lqfp configuration of the dsp56f801. figure 33. top view, dsp56f801 48-pin lqfp package pin 1 orientation mark tdo td1 td2 /ss miso mosi sclk txdo vss vdd rxd0 de tcs tck tms ireqa tdi vcapc2 vss vdd extal xtal tdo trst ana4 ana3 vref ana2 ana1 ana0 faulta0 vss vdd vssa vdda reset pwma5 pwma4 pwma3 pwma2 pwma1 vss vdd vcapc1 pwma0 ana7 ana6 ana5 13 37 25 motorola dsp56f801
36 dsp56f801 preliminary technical data motorola table 31. dsp56f801 pin identification by pin number pin no. signal name pin no. signal name pin no. signal name pin no. signal name 1 td0 13 tcs 25 reset 37 ana5 2td114tck26v dda 38 ana6 3td215tms27v ssa 39 ana7 4ss 16 ireqa 28 v dd 40 pwma0 5miso17 tdi 29 v ss 41 vcapc1 6 mosi 18 vcapc2 30 faulta0 42 v dd 7sclk19 v ss 31 ana0 43 v ss 8txd020v dd 32 ana1 44 pwma1 9v ss 21 extal 33 ana2 45 pwma2 10 v dd 22 xtal 34 vref 46 pwma3 11 rxd0 23 tdo 35 ana3 47 pwma4 12 de 24 trst 36 ana4 48 pwma5
package and pin-out information dsp56f801 motorola dsp56f801 preliminary technical data 37 figure 34. 48-pin lqfp mechanical information a a1 z 0.200 ab t-u 4x z 0.200 ac t-u 4x b b1 1 12 13 24 25 36 37 48 s1 s v v1 p ae ae t, u , z detail y detail y base metal n j f d t-u m 0.080 z ac section ae-ae ad g 0.080 ac m top & bottom l w k aa e c h 0.250 r 9 detail ad notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeter. 3. datum plane ab is located at bottom of lead and is coincident with the lead where the lead exits the plastic body at the bottom of the parting line. 4. datums t, u, and z to be determined at datum plane ab. 5. dimensions s and v to be determined at seating plane ac. 6. dimensions a and b do not include mold protrusion. allowable protrusion is 0.250 per side. dimensions a and b do include mold mismatch and are determined at datum plane ab. 7. dimension d does not include dambar protrusion. dambar protrusion shall not cause the d dimension to exceed 0.350. 8. minimum solder plate thickness shall be 0.0076. case 932-03 issue f t u z ab ac gauge plane dim a min max 7.000 bsc millimeters a1 3.500 bsc b 7.000 bsc b1 3.500 bsc c 1.400 1.600 d 0.170 0.270 e 1.350 1.450 f 0.170 0.230 g 0.500 bsc h 0.050 0.150 j 0.090 0.200 k 0.500 0.700 m 12 ref n 0.090 0.160 p 0.250 bsc l 0 7 r 0.150 0.250 s 9.000 bsc s1 4.500 bsc v 9.000 bsc v1 4.500 bsc w 0.200 ref aa 1.000 ref
38 dsp56f801 preliminary technical data motorola part 5 design considerations 5.1 thermal design considerations an estimation of the chip junction temperature, t j , in c can be obtained from the equation: equation 1: where: t a = ambient temperature c r q ja = package junction-to-ambient thermal resistance c/w p d = power dissipation in package historically, thermal resistance has been expressed as the sum of a junction-to-case thermal resistance and a case-to-ambient thermal resistance: equation 2: where: r q ja = package junction-to-ambient thermal resistance c/w r q jc = package junction-to-case thermal resistance c/w r q ca = package case-to-ambient thermal resistance c/w r q jc is device-related and cannot be influenced by the user. the user controls the thermal environment to change the case-to-ambient thermal resistance, r q ca . for example, the user can change the air flow around the device, add a heat sink, change the mounting arrangement on the printed circuit board (pcb), or otherwise change the thermal dissipation capability of the area surrounding the device on the pcb. this model is most useful for ceramic packages with heat sinks; some 90% of the heat flow is dissipated through the case to the heat sink and out to the ambient environment. for ceramic packages, in situations where the heat flow is split between a path to the case and an alternate path through the pcb, analysis of the device thermal performance may need the additional modeling capability of a system level thermal simulation tool. the thermal performance of plastic packages is more dependent on the temperature of the pcb to which the package is mounted. again, if the estimations obtained from r q ja do not satisfactorily answer whether the thermal performance is adequate, a system level model may be appropriate. definitions: a complicating factor is the existence of three common definitions for determining the junction-to-case thermal resistance in plastic packages: ? measure the thermal resistance from the junction to the outside surface of the package (case) closest to the chip mounting area when that surface has a proper heat sink. this is done to minimize temperature variation across the surface. ? measure the thermal resistance from the junction to where the leads are attached to the case. this definition is approximately equal to a junction to board thermal resistance. t j t a p d r q ja () + = r q ja r q jc r q ca + =
electrical design considerations motorola dsp56f801 preliminary technical data 39 ? use the value obtained by the equation (t j C t t )/p d where t t is the temperature of the package case determined by a thermocouple. the junction-to-case thermal resistances quoted in this data sheet are determined using the first definition on page 45. from a practical standpoint, that value is also suitable for determining the junction temperature from a case thermocouple reading in forced convection environments. in natural convection, using the junction-to-case thermal resistance to estimate junction temperature from a thermocouple reading on the case of the package will estimate a junction temperature slightly hotter than actual. hence, the new thermal metric, thermal characterization parameter, or y jt , has been defined to be (t j C t t )/p d . this value gives a better estimate of the junction temperature in natural convection when using the surface temperature of the package. remember that surface temperature readings of packages are subject to significant errors caused by inadequate attachment of the sensor to the surface and to errors caused by heat loss to the sensor. the recommended technique is to attach a 40-gauge thermocouple wire and bead to the top center of the package with thermally conductive epoxy. 5.2 electrical design considerations use the following list of considerations to assure correct dsp operation: ? provide a low-impedance path from the board power supply to each v dd pin on the dsp, and from the board ground to each v ss (gnd) pin. ? the minimum bypass requirement is to place six 0.01C0.1 m f capacitors positioned as close as possible to the package supply pins. the recommended bypass configuration is to place one bypass capacitor on each of the ten v dd /v ss pairs, including v dda /v ssa. the vcap capacitors must be 150 milliohm or less esr capacitors. ? ensure that capacitor leads and associated printed circuit traces that connect to the chip v dd and v ss (gnd) pins are less than 0.5 inch per capacitor lead. ? use at least a four-layer printed circuit board (pcb) with two inner layers for v dd and v ss . ? bypass the v dd and v ss layers of the pcb with approximately 100 m f, preferably with a high- grade capacitor such as a tantalum capacitor. ? because the dsp output signals have fast rise and fall times, pcb trace lengths should be minimal. ? consider all device loads as well as parasitic capacitance due to pcb traces when calculating capacitance. this is especially critical in systems with higher capacitive loads that could create higher transient currents in the v dd and gnd circuits. caution this device contains protective circuitry to guard against damage due to high static voltage or electrical fields. however, normal precautions are advised to avoid application of any voltages higher than maximum rated voltages to this high-impedance circuit. reliability of operation is enhanced if unused inputs are tied to an appropriate voltage level.
dsp56f801/d motorola and the stylized m logo are registered in the us patent & trademark office. all other product or service names are the property of their respective owners. ? motorola, inc. 2002. how to reach us: usa/europe/locations not listed: motorola literature distribution; p.o. box 5405, denver, colorado 80217. 1C303C675C2140 or 1C800C441C2447 japan: motorola japan ltd.; sps, technical information center, 3C20C1, minamiCazabu. minatoCku, tokyo 106C8573 japan. 81C3C3440C3569 asia/pacific: motorola semiconductors h.k. ltd.; silicon harbour centre, 2 dai king street, tai po industrial estate, tai po, n.t., hong kon g . 852C26668334 technical information center: 1C800C521C6274 home page: http://www.motorola.com/semiconductors/ motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, represen tation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application o r use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. typical param eters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all oper ating parameters, including typicals must be validated for each customer application by customers technical experts. motorola does not convey any licens e under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for sur gical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product cou ld create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer s hall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expens es, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized u se, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and the stylized m logo are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. ? take special care to minimize noise levels on the vref, v dda and v ssa pins. ? designs that utilize the trst pin for jtag port or once module functionality (such as development or debugging systems) should allow a means to assert trst whenever reset is asserted, as well as a means to assert trst independently of reset . designs that do not require debugging functionality, such as consumer products, should tie these pins together. ? because the flash memory is programmed through the jtag/once port, designers should provide an interface to this port to allow in-circuit flash programming. part 6 ordering information table 32 lists the pertinent information needed to place an order. consult a motorola semiconductor sales office or authorized distributor to determine availability and to order parts. table 32. dsp56f801 ordering information part supply voltage package type pin count frequency (mhz) order number dsp56f801 3.0C3.6 v low profile plastic quad flat pack (lqfp) 48 80 dsp56f801fa80

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