LC895124 查看數據表（PDF） - SANYO -> Panasonic

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LC895124

CD-ROM Driver with On-Chip SCSI Interface and Subcode Functions

SANYO -> Panasonic 

LC895124

Pin Functions

1. SCSI Pins

• BSY, ACK, MSG, SEL, REQ, ATN, I/O, C/D (input and output)

SCSI bus control pins.

• DB0 to DB7, DBPB (input and output)

These are the SCSI data bus pins.

2. Microcontroller Interface Pins

• ZCS (input)

Microcontroller chip select line

• CSCTRL (input)

Microcontroller chip select logic selection signal

High - ZCS is an active low signal.

Low - ZCS is an active high signal.

• ZRD, ZWR, SUA0 to SUA6 (input)

Microcontroller interface control signal

The SUA0 to SUA6 pins are used for addressing.

• ZSWAIT (output)

When the microcontroller accesses RAM, it must wait if this pin is low.

This is a built-in pull-up resistor open drain output.

• D7 to D0 (input and output)

Microcontroller data bus. Pull-up resistors are built in.

• ZINT0, ZINT1 (output)

Interrupt request output to the microcontroller. A SCSI-side interrupt can be output from ZINT1 by setting the C

register (bit 7 in R11).

This is a built-in pull-up resistor open drain output.

3. Buffer RAM Pins

• IO0 to IO15 (input and output)

Buffer RAM data bus. Pull-up resistors are built in. The IO8 to IO15 pins have shared functions as the RA9 to

RA16 pins.

This means that 16-bit PSRAM cannot be used.

• RA0 to RA16 (output)

Buffer RAM address lines. RA9 to RA16 have shared functions as the IO8 to IO15 pins.

This means that 16-bit PSRAM cannot be used.

• ZRAS0, ZRAS1, (ZCS0), (ZCS1) (output)

Buffer DRAM RAS outputs. Normally, ZRAS0 is used. However, when two 1-MB (64k × 16-bit) DRAM chips

are used, the respective DRAM RAS pins are connected to ZRAS0 and ZRAS1. Connected to the CS pin if

PSRAM is used.

• ZCAS0, ZCAS1 (output)

Buffer DRAM CAS outputs. Normally, ZCAS0 is used. However, when two 1-MB (64k × 16-bit) DRAM chips

are used, the respective DRAM CAS pins are connected to ZCAS0.

• ZOE (output)

Buffer RAM read output signal

• ZUWE, ZLWE (output)

Buffer RAM write output signals. Connected to the corresponding pins on the RAM chip.

Leave ZUWE open if an 8-bit RAM is used.

4. CD DSP Data Pins

• BCK, SDATA, LRCK, C2PO (input)

The LC895124 reads in CD-ROM data over these pins connected to a CD DSP.

C2PO is the C2 flag pin.

No. 5240-7/8

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