lc89512w Sanyo Semiconductor Corporation, lc89512w Datasheet

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lc89512w

Manufacturer Part Number
lc89512w
Description
Cd-rom Error Correction Lsi With Built-in Scsi Interface
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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Part Number:
lc89512w-V25
Manufacturer:
SANYO/三洋
Quantity:
20 000
Preliminary
Overview
The LC89512W integrates a real-time error correction
circuit and a SCSI interface in a single chip.
Functions
• CD-ROM error correction function, subcode readout
Features
• Support for double-speed drives at an operating
• Support for quad-speed drives at an operating frequency
• Built-in SCSI interface with built-in 48 mA sink buffer
• Built-in 12-byte output FIFO for sub-CPU to host
• Built-in 12-byte input FIFO for host computer to sub-
• Subcode data can be written to buffer RAM and the sub-
• Sub-CPU access of buffer RAM through the LC89512
• Built-in function for buffer RAM internal data transfer
• Pseudo-SRAM (128-kword
• DRAM (two 256-kword
• Transfer speeds:
• Operating frequencies: 16.9344 MHz (up to double
Ordering number : EN*4852B
function, SCSI interface
frequency of 16.9344 MHz
Either SRAM (120 ns), DRAM (80 ns) or pseudo
SRAM (85 ns) can be used.
of 33.8688 MHz
SRAM (70 ns) must be used.
(Only the TARGET function is supported.)
computer data transmission
CPU data transmission
CPU can read the subcode values by connecting the
LC89512 to the CD-DSP subcode pin.
used.
4-bit chips) can be used.
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.)
speed), 33.8688 (quad speed)
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
4-bit chips or two 1-Mword
8-bit and smaller) can be
Package Dimensions
unit: mm
3181A-SQFP100
CD-ROM Error Correction LSI
with Built-In SCSI Interface
O3095HA (OT)/D1694TH (OT) No. 4852-1/5
[LC89512W]
LC89512W
SANYO: SQFP100
CMOS LSI

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lc89512w Summary of contents

Page 1

... Ordering number : EN*4852B Preliminary Overview The LC89512W integrates a real-time error correction circuit and a SCSI interface in a single chip. 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. • ...

Page 2

... Block Diagram LC89512W No. 4852-2/5 ...

Page 3

... RA3 O 46 RA4 O 47 RA5 O 48 RA6 O Data buffer RAM address signal outputs 49 RA7 O 50 RA8 O 51 RA9 O 52 RA10 O 53 RA11 O LC89512W Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection pin Function Continued on next page. No. 4852-3/5 ...

Page 4

... Note must be left open. Do not connect any signals to these pins the logic system ground and LC89512W Function . Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection pin 1 is the SCSI interface ground. (from the standard cell version) Continued on next page ...

Page 5

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of February, 1997. Specifications and information herein are subject to change without notice. LC89512W = 0 V Symbol Conditions ...

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