LC895195 Datasheet, PDF (6/8 Pages) Sanyo Semicon Device – ATA-PI (IDE) CD-ROM Decoder LSI

LC895195
Pin Functions
1. ATA-PI Pins
• ZCS1FX (input)
Chip select signal for selecting the command block register.
• ZCS3FX (input)
Chip select signal for selecting the control block register.
• DA0 to DA2 (input)
Address for accessing the ATAPI registers.
• ZDASP (I/O)
Drive 1 is output and drive 0 is input.
Signal used to indicate to drive 0 that drive 1 exists.
An external pull-up resistor must be connected to this pin.
• DD0 to DD15 (I/O)
16-bit data bus. Can be used for either 8-bit or 16-bit data transfers.
• ZDIOR (input)
Read strobe signal from the host.
• ZDIOW (input)
Write strobe signal from the host.
• ZDMACK (input)
Acknowledge signal from the host in response to the drive DMARQ request signal during DMA transfers.
The pin circuit does not include a pull-up resistor.
• DMARQ (output)
Drive request signal during DMA transfers
• HINTRQ (output)
Drive interrupt signal to the host
• ZIOCS16 (output)
Signal asserted by the drive when the drive supports 16-bit transfers.
This signal is not asserted during DMA transfers.
• IORDY (output)
Signal that indicates that the drive has completed response preparations during data transfers.
This signal is low when the drive is not ready.
• ZPDIAG (I/O)
Signal asserted by drive 1 to inform drive 0 that diagnostics have completed.
An external pull-up resistor must be connected to this pin.
• ZHRST (input)
Reset signal from the host.
The pin circuit does not include a pull-up resistor.
2. MC (microcontroller) Interface Pins
• ZCS (input)
Microcontroller chip select signal
• CSCTRL (input)
Microcontroller chip select logic selection signal
High - ZCS functions as an active low signal.
Low - ZCS functions as an active high signal.
• ZRD, ZWR, SUA0 to SUA6 (input)
Microcontroller interface control signals.
The SUA0 to SUA6 pins are address lines.
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