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LC89512W

Sanyo
Part Number LC89512W
Manufacturer Sanyo
Description CD-ROM Error Correction LSI
Published Apr 25, 2005
Detailed Description Ordering number : EN*4852B CMOS LSI LC89512W CD-ROM Error Correction LSI with Built-In SCSI Interface Preliminary Over...
Datasheet PDF File LC89512W PDF File

LC89512W
LC89512W

Overview
Ordering number : EN*4852B CMOS LSI LC89512W CD-ROM Error Correction LSI with Built-In SCSI Interface Preliminary Overview The LC89512W integrates a real-time error correction circuit and a SCSI interface in a single chip.
Package Dimensions unit: mm 3181A-SQFP100 [LC89512W] Functions • CD-ROM error correction function, subcode readout function, SCSI interface Features • Support for double-speed drives at an operating frequency of 16.
9344 MHz Either SRAM (120 ns), DRAM (80 ns) or pseudo SRAM (85 ns) can be used.
• Support for quad-speed drives at an operating frequency of 33.
8688 MHz SRAM (70 ns) must be used.
• Built-in SCSI interface with built-in 48 mA sink buffer (Only the TARGET function is supported.
) • Built-in 12-byte output FIFO for sub-CPU to host computer data transmission • Built-in 12-byte input FIFO for host computer to subCPU data transmission • Subcode data can be written to buffer RAM and the subCPU can read the subcode values by connecting the LC89512 to the CD-DSP subcode pin.
• Sub-CPU access of buffer RAM through the LC89512 • Built-in function for buffer RAM internal data transfer • Pseudo-SRAM (128-kword × 8-bit and smaller) can be used.
• DRAM (two 256-kword × 4-bit chips or two 1-Mword × 4-bit chips) can be used.
• Transfer speeds: 2.
8 MB/second (asynchronous mode) (for CD-ROM decode only operation) 4.
2 MB/second (synchronous mode) (CD-ROM decode operation is not supported in synchronous mode) Both of these transfer modes use a 16.
9344 MHz clock.
(The transfer speed depends on the frequency used.
) • Operating frequencies: 16.
9344 MHz (up to double speed), 33.
8688 (quad speed) SANYO: SQFP100 SANYO Electric Co.
,Ltd.
Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg.
, 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN O3095HA (OT)/D1694TH (OT) No.
4852-1/5 LC89512W Block Diagram No.
4852-2/5 LC89512W Pin Functions Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection pin Pin No.
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