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LC895125Q Datasheet(PDF) 10 Page - Sanyo Semicon Device |
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LC895125Q Datasheet(HTML) 10 Page - Sanyo Semicon Device |
10 / 11 page 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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