Preliminary Product Bulletin Microcontroller ARM7TDMI 32-bit
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CL-SH8665
Preliminary Product Bulletin
Microcontroller
ARM7TDMI 32-bit RISC processor
High-performance RISC core ideal integration into disk drive electronics solutions Excellent MIPS/die size MIPS/watt with high code density open architecture
Integrated Drive Electronics
DSP-assist logic
Rounding, scaling, saturation operation hardware
OVERVIEW
CL-SH8665 high-performance, low-cost, integrated microcontroller, disk controller, read channel. CL-SH8665, flash memory, DRAM buffer memory, preamplifier, power drivers comprise complete drive electronics solution disk drives. ARM7TDMI 32-bit RISC processor core delivers high performance small core size with power consumption. Combining core with DSP-assist logic provides enough bandwidth
(cont.) (cont.)
Internal memory
Kbytes instruction/data SRAM Kbytes instruction (mask-programmable)
External memory
Kbytes addressable memory with programmable chip selects flash/ROM/SRAM
Peripherals
Interrupt controller Timers UART General-purpose
JTAG boundary scan
System Block Diagram
HOST BA[8:0] DRAM BD[15:0] OSC/PLL/CLOCKS POWER MGT. JTAG/TEST PORTS MICROCONTROLLER BLOCK MA[22:0] [BURST] ROM/FLASH MD[15:0] BUS/MEMORY CONTROLLER
CL-SH7656 CORE PERIPHERAL
CL-SH33XX READ CHANNEL
PREAMP INTERFACE
BUFFER MEMORY XTAL
CUSTOMER-DEFINED CONTROL LOGIC
SERVO POWER DRIVERS
UART TIMERS INTERRUPT GPIO SRAM
ADDR
EXTERNAL MICROCONTROLLER MEMORY
ARM7TDMI 32-BIT RISC CORE
DATA
SRAM (OPTIONAL)
June 1998
CL-SH8665
Integrated Drive Electronics
FEATURES (cont.)
Disk Controller (CL-SH7656)
Ultra support (33.3 Mbytes/sec.) Direct buffer access Buffer bandwidth
Mbytes/sec. with DRAM 40-MHz SYSCLK
8-bit disk data rate Mbits/sec. maximum Advanced capabilities
Fourth-order analog (low-pass filter) 6-bit flash (analog-to-digital converter) Rate 16/17 encoder/decoder Enhanced partial response sequence detector Thermal asperity detection correction capability heads
General
Customer-defined control logic On-chip oscillator frequency synthesizer Power management
Three system power modes (Run, Idle, Sleep), plus clock disabling idle subsystems
Read Channel
User data rate from Mbits/sec. Digitally controlled (variable gain amplifier) Ten-tap adaptive digital (finite impulse response) equalization filter
3.3-volt, 0.35-micron design
OVERVIEW (cont.)
manage servo spindle control, well disk controller other drive functions. Thumbtechnology from ARMallows 16-bit instructions executed within 32-bit processor core, reducing firmware code size with penalty performance. critical functions, such servo processing interrupt handling, 32-bit instructions employed. high-speed 16-bit external used instruction fetch from flash memory. Data memory accessed through internal SRAM using portion buffer memory with direct processor access through disk controller. hard disk controller logic (CL-SH7656 core) offers full hardware support ID-less architecture, including automatic sector pulse generation, logical sector mapping on-track defect management. Buffer bandwidth using DRAM Mbytes/sec. sustain host data rates 33.3 Mbytes/sec. Ultra mode disk data rates Mbits/sec. (for controller). advanced logic provides five-byte error correction correct single-burst error bits double-burst error bits on-the-fly. addition, higher correction power achieved with off-line firmware correction erasure pointer support. read channel logic (CL-SH3360 core) sampled amplitude digital read/write channel that provides highly flexible, state-of-the-art, synchronous read path high-density magnetic disk drives. addition, this block programmable architecture calibration feature that allows channel parameters tuned characteristics each drive, head, zone. High disk data rates Mbits/sec. (for channel) erasure pointers supported. shown system block diagram page CL-SH8665, external flash memory, external buffer memory, preamplifier, power drivers comprise bulk drive electronics required disk drive. on-chip oscillator frequency synthesizer provide clock frequencies required processor, peripheral, disk controller subsystems. Sophisticated power management configured three system power modes, plus automatic clock disabling idle subsystems delivers maximum power savings. CL-SH8665 designed 3.3-volt, 0.35micron process with 5-volt-tolerant I/Os. device available 208-pin package.
CL-SH8665
Integrated Drive Electronics
MICROCONTROLLER
MICROCONTROLLER INTERFACE ULTRA CONTROL HOST INTERFACE LOGIC AUTO DETECTION LOGIC CONTROL/ STATUS CONTROL CONTROL SMASH ENGINE SECTOR MARK SPLIT HANDLING
(WRITABLE CONTROL STORE) BYTES
HOST SYSTEM
DEFECT MANAGEMENT LOGICAL SECTOR MAPPING
3-WAY INTERLEAVED REED-SOLOMON ECC97 CORRECTOR
SEQUENCER CONTROL DISK INTERFACE LOGIC
DISK INTERFACE (ENDEC)
80-BYTE HOST FIFO
FREQUENCY SYNTHESIZER
BUFFER CONTROL LOGIC CHANNEL ARBITRATION DRAM INTERFACE LOGIC
DATA PATH 64-BYTE DISK FIFO
CL-SH7656 Core
BUFFER MEMORY
Figure
Disk Controller Block Diagram
AUX_IN<2:1> DIAG<4:3>
VIEW<2:1> DIAG<2:1>
TCLK TBUS<1:0>
RST* AD<7:0>
SDAT SENA SCLK
VDDA GNDA
PREAMP INTERFACE
DIAG
VIEW
POWER CONTROL
MICROPROCESSOR REGISTER INTERFACE
GNDD_3V VDDD_3V
ANALOG
10-TAP
SERVO BURST DEMOD SYNC MARK DETECT
DMUX
OFFSET CONTROL
FSMD*
GAIN CONTROL
BANDGAP REFERENCE
DECODER DATA RANDOMIZER ENCODER DISK CONTROLLER INTERFACE
REXT
NRZ<7:0> ERR<1:0> 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
Read Channel Block Diagram
CL-SH8665
Preliminary Product Bulletin
Direct Sales Offices
Domestic
CALIFORNIA Fremont TEL: 510/623-8300 FAX: 510/252-6020 CALIFORNIA Westlake Village TEL: 805/371-5860 FAX: 805/371-5861 NORTHWESTERN AREA Portland, TEL: 503/620-5547 FAX: 503/620-5665 SOUTH CENTRAL AREA Austin, TEL: 512/255-0080 FAX: 512/255-0733 Houston, TEL: 281/257-2525 FAX: 281/257-2555 NORTHEASTERN AREA Andover, TEL: 978/794-9992 FAX: 978/794-9998 SOUTHEASTERN AREA Raleigh, TEL: 919/859-5210 FAX: 919/859-5334 Boca Raton, 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 Silicon
Cirrus Logic premier supplier advanced integrated circuits that combine mixed-signal processing, precision analog techniques, embedded processors, application-specific algorithms into system-on-a-chip solutions existing emerging growth markets. Enhanced strong systems expertise selected markets, company's products high value major brands worldwide magnetic optical storage, networking communications, consumer/professional audio, video, imaging, ultra-precision data acquisition. Cirrus Logic's manufacturing strategy ensures maximum product quality availability, well access world-class processing technologies through joint ventures with IBM® Lucent Technologies®. Contact systems applications specialists your company benefit from high value Cirrus Logic adds customers' products. Copyright 1998 Cirrus Logic, Inc. rights reserved.
Preliminary product information describes products that production, which full characterization data available. Cirrus Logic, Inc. made best efforts ensure that information contained this document accurate reliable. However, information subject change without notice. responsibility assumed Cirrus Logic, Inc. this information, infringements patents other rights third parties. This document implies license under patents, copyrights, trade secrets. Cirrus Logic, Crystal trademarks Cirrus Logic, Inc., which registered some jurisdictions. Other trademarks this document belong their respective companies. CRUS Cirrus Logic International, Ltd. trade names Cirrus Logic, Inc.
Cirrus Logic, Inc.
3100 West Warren Ave., Fremont, 94538 TEL: 510/623-8300 FAX: 510/252-6020
Publications Ordering: 800/359-6414 (USA) 510/249-4200 Worldwide Web: http://www.cirrus.com
258665-001
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