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| CL-SH8665 Preliminary Product Bulletin FEATURES Microcontroller s ARM7TDMI 32-bit RISC processor -- High-performance RISC core ideal for integration into disk drive electronics solutions -- Excellent MIPS/die size and MIPS/watt with high code density and an open architecture Integrated ATA Drive Electronics s DSP-assist logic -- Rounding, scaling, and saturation operation in hardware OVERVIEW The CL-SH8665 is a high-performance, low-cost, integrated microcontroller, ATA disk controller, and read channel. The CL-SH8665, flash memory, EDO DRAM buffer memory, preamplifier, and power drivers comprise a complete drive electronics solution for ATA disk drives. The ARM7TDMI 32-bit RISC processor core delivers high performance in a small core size with low power consumption. Combining the ARM core with the DSP-assist logic provides enough bandwidth to (cont.) (cont.) s Internal memory -- 4 Kbytes of instruction/data SRAM -- 16 Kbytes of instruction ROM (mask-programmable) s External memory -- 512 Kbytes of addressable memory with up to two programmable chip selects for flash/ROM/SRAM s Peripherals -- -- -- -- Interrupt controller Timers UART General-purpose I/O s JTAG boundary scan System Block Diagram ATA HOST BUS BA[8:0] EDO DRAM BD[15:0] OSC/PLL/CLOCKS POWER MGT. JTAG/TEST PORTS MICROCONTROLLER BLOCK DSP MA[22:0] [BURST] ROM/FLASH MD[15:0] BUS/MEMORY CONTROLLER 23 CL-SH7656 HDC CORE PERIPHERAL BUS CL-SH33XX READ CHANNEL PREAMP INTERFACE BUFFER MEMORY XTAL CUSTOMER-DEFINED CONTROL LOGIC SERVO POWER DRIVERS 16 UART TIMERS INTERRUPT GPIO SRAM 1K x 32 ADDR EXTERNAL MICROCONTROLLER MEMORY ARM7TDMI 32-BIT RISC CPU CORE 23 DATA SRAM (OPTIONAL) CPU BUS ROM 4K x 32 32 June 1998 CL-SH8665 Integrated ATA Drive Electronics FEATURES (cont.) ATA Disk Controller (CL-SH7656) s Ultra DMA support (33.3 Mbytes/sec.) s Direct buffer access by CPU s Buffer bandwidth -- 64 Mbytes/sec. with EDO DRAM and 40-MHz SYSCLK s s s s s 8-bit NRZ disk data rate -- 260 Mbits/sec. maximum s Advanced ECC capabilities Fourth-order analog LPF (low-pass filter) 6-bit flash ADC (analog-to-digital converter) Rate 16/17 d=0 RLL encoder/decoder Enhanced PR4 partial response sequence detector s Thermal asperity detection and correction capability for MR heads General s Customer-defined control logic s On-chip oscillator and frequency synthesizer s Power management -- Three system power modes (Run, Idle, and Sleep), plus clock disabling of idle subsystems Read Channel s User data rate from 47 to 245 Mbits/sec. s Digitally controlled VGA (variable gain amplifier) s Ten-tap adaptive digital FIR (finite impulse response) equalization filter s 3.3-volt, 0.35-micron design OVERVIEW (cont.) manage servo and spindle control, as well as disk controller and other drive functions. The ThumbTM technology from ARMTM allows 16-bit instructions to be executed within the 32-bit processor core, reducing the firmware code size with no penalty in performance. For critical functions, such as servo processing or interrupt handling, 32-bit instructions can be employed. A high-speed 16-bit external bus is used for instruction fetch from flash memory. Data memory can be accessed through the internal SRAM or by using a portion of the buffer memory with direct processor access through the disk controller. The hard disk controller logic (CL-SH7656 core) offers full hardware support of the ID-less architecture, including automatic sector pulse generation, logical sector mapping and on-track defect management. Buffer bandwidth using EDO DRAM of up to 64 Mbytes/sec. can sustain host data rates of 33.3 Mbytes/sec. in Ultra DMA mode 2 and disk data rates up to 260 Mbits/sec. (for the controller). The advanced ECC logic provides five-byte error correction and can correct a single-burst error of 113 bits or a double-burst error of 49 bits on-the-fly. In addition, higher ECC correction power can be achieved with off-line firmware correction and erasure pointer support. The read channel logic (CL-SH3360 core) is a sampled amplitude digital read/write channel that provides a highly flexible, state-of-the-art, synchronous read path for high-density magnetic disk drives. In addition, this block has a programmable architecture and calibration feature that allows the channel parameters to be tuned to characteristics of each drive, head, and zone. High disk data rates -- up to 245 Mbits/sec. (for the channel) -- and erasure pointers are supported. As shown in the system block diagram on page 1, the CL-SH8665, external flash memory, external buffer memory, a preamplifier, and the power drivers comprise the bulk of the drive electronics required for an ATA disk drive. An on-chip oscillator and frequency synthesizer provide all clock frequencies required by the processor, peripheral, and disk controller subsystems. Sophisticated power management can be configured for three system power modes, plus automatic clock disabling of idle subsystems delivers maximum power savings. The CL-SH8665 is designed in a 3.3-volt, 0.35micron process with 5-volt-tolerant I/Os. The device is available in a 208-pin package. CL-SH8665 Integrated ATA Drive Electronics MICROCONTROLLER MICROCONTROLLER INTERFACE ULTRA DMA CONTROL ATA HOST INTERFACE LOGIC AUTO R/W DETECTION LOGIC 8 CONTROL/ STATUS B I T CONTROL B U S CONTROL SMASH ENGINE SECTOR MARK AND SPLIT HANDLING WCS (WRITABLE CONTROL STORE) 31 x 4 BYTES HOST SYSTEM DEFECT MANAGEMENT AND LOGICAL SECTOR MAPPING 16 3-WAY INTERLEAVED REED-SOLOMON ECC97 CORRECTOR SEQUENCER CONTROL AND DISK INTERFACE LOGIC DISK INTERFACE (ENDEC) 80-BYTE HOST FIFO FREQUENCY SYNTHESIZER 16 BUFFER CONTROL LOGIC CHANNEL ARBITRATION DRAM INTERFACE LOGIC 16 NRZ DATA PATH 64-BYTE DISK FIFO 8 CL-SH7656 Core BUFFER MEMORY Figure 1. ATA Disk Controller Block Diagram AUX_IN<2:1> / DIAG<4:3> VIEW<2:1> / DIAG<2:1> TCLK TBUS<1:0> RST* CS* ALE WR* RD* AD<7:0> SDAT SENA SCLK VDDA GNDA PREAMP INTERFACE DIAG MUX VIEW DAC POWER CONTROL MICROPROCESSOR REGISTER INTERFACE GNDD_3V VDDD_3V INP VGA INN ANALOG LPF ADC 10-TAP FIR ITR SERVO BURST DEMOD SYNC MARK DETECT DMUX OFFSET CONTROL TAD TAD MUX ZPR PLL FSMD* GAIN CONTROL BANDGAP REFERENCE RLL DECODER DATA RANDOMIZER RLL ENCODER DISK CONTROLLER INTERFACE REXT NRZ<7:0> ERR<1:0> RG WG* SG RCLK WCLK SLICER REF_CLK SERVO & DATA FREQUENCY SYNTHESIZERS CMUX READ CLOCK SEQUENCE DETECTOR WGB_PRE WD0P VDDA_5V WD0N WRITE PRECOMP ADDRESS MARK DETECT CHANNEL QUALITY Figure 2. Read Channel Block Diagram CL-SH8665 Preliminary Product Bulletin Direct Sales Offices Domestic N. CALIFORNIA Fremont TEL: 510/623-8300 FAX: 510/252-6020 S. CALIFORNIA Westlake Village TEL: 805/371-5860 FAX: 805/371-5861 NORTHWESTERN AREA Portland, OR TEL: 503/620-5547 FAX: 503/620-5665 SOUTH CENTRAL AREA Austin, TX TEL: 512/255-0080 FAX: 512/255-0733 Houston, TX TEL: 281/257-2525 FAX: 281/257-2555 NORTHEASTERN AREA Andover, MA TEL: 978/794-9992 FAX: 978/794-9998 SOUTHEASTERN AREA Raleigh, NC TEL: 919/859-5210 FAX: 919/859-5334 Boca Raton, FL TEL: 561/395-1613 FAX: 561/395-1373 International CHINA Beijing TEL: 86/10-6428-0783 FAX: 86/10-6428-0786 FRANCE Paris TEL: 33/1-48-12-2812 FAX: 33/1-48-12-2810 GERMANY Herrsching TEL: 49/81-52-92460 FAX: 49/81-52-924699 HONG KONG Tsimshatsui TEL: 852/2376-0801 FAX: 852/2375-1202 JAPAN Tokyo TEL: 81/3-3340-9111 FAX: 81/3-3340-9120 KOREA Seoul TEL: 82/2-565-8561 FAX: 82/2-565-8565 SINGAPORE TEL: 65/743-4111 FAX: 65/742-4111 TAIWAN Taipei TEL: 886/2-2718-4533 FAX: 886/2-2718-4526 UNITED KINGDOM London, England TEL: 44/01628-472211 FAX: 44/01628-486114 High-Value Systems in Silicon Cirrus Logic is a premier supplier of advanced integrated circuits that combine mixed-signal processing, precision analog techniques, embedded processors, and application-specific algorithms into system-on-a-chip solutions for existing and emerging growth markets. Enhanced by strong systems expertise in selected markets, the company's products add high value to major brands worldwide in magnetic and optical storage, networking communications, consumer/professional audio, video, and imaging, and ultra-precision data acquisition. Cirrus Logic's manufacturing strategy ensures maximum product quality and availability, as well as access to world-class processing technologies through joint ventures with IBM(R) and Lucent Technologies(R). Contact one of our systems and applications specialists to see how your company can benefit from the high value Cirrus Logic adds to its customers' products. Copyright (c) 1998 Cirrus Logic, Inc. All rights reserved. Preliminary product information describes products that are in production, but for which full characterization data is not yet available. Cirrus Logic, Inc. has made best efforts to ensure that the information contained in this document is accurate and reliable. However, the information is subject to change without notice. No responsibility is assumed by Cirrus Logic, Inc. for the use of this information, nor for infringements of patents or other rights of third parties. This document implies no license under patents, copyrights, or trade secrets. Cirrus Logic, and Crystal are trademarks of Cirrus Logic, Inc., which may be registered in some jurisdictions. Other trademarks in this document belong to their respective companies. CRUS and Cirrus Logic International, Ltd. are trade names of Cirrus Logic, Inc. Cirrus Logic, Inc. 3100 West Warren Ave., Fremont, CA 94538 TEL: 510/623-8300 FAX: 510/252-6020 Publications Ordering: 800/359-6414 (USA) or 510/249-4200 Worldwide Web: http://www.cirrus.com 258665-001 |
Price & Availability of CL-SH8665
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