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LC895125Q Datasheet(PDF) 10 Page - Sanyo Semicon Device

Part # LC895125Q
Description  CD-ROM Driver with On-Chip SCSI Interface and Subcode Functions
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC895125Q Datasheet(HTML) 10 Page - Sanyo Semicon Device

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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. Subcode Interface Pins
• EXCK, WFCK, SBSO, SCOR (input and output)
Subcode interface pins. Connecting a CD DSP using these pins allows the LC895125 to read in subcode data and
transfer it to the host.
No. 5241-10/11
LC895125Q, 895125W


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