lc897194 Sanyo Semiconductor Corporation, lc897194 Datasheet - Page 9

• Manufacturer Part Number: lc897194
• Description: Cd-rom Decoder With Built-in Atapi Ide And Dvd Ecc Interfaces
• Manufacturer: Sanyo Semiconductor Corporation

Pin Descriptions
1. ATAPI Pins
2. Microcontroller Interface Pins
ZCS1FX (input)
ZCS3FX (input)
DA0 to DA2 (input)
ZDASP(input/output)
DD0 to DD15 (input/output)
ZDIOR (input)
ZDIOW (input)
ZDMACK (input)
DMARQ (output)
HINTRQ (output)
ZIOCS16 (output)
IORDY (output)
ZPDIAG (input/output)
ZHRST (input)
ZCS (input)
CSCTRL (input)
ZRD, ZWR, SUA0 to SUA6 (input)
RSSEL (input)
ZSWAIT (output)
D7 to D0 (input/output)
ZINT0 (output)
ZINT1 (output)
Chip select signal used to select the command block register.
Chip select signal used to select the control block register.
Address used to access the ATAPI registers.
Drive 1 is output, drive 0 is input.
Signal used to indicate to drive 0 that drive 1 exists. An external pull-up resistor must be provided.
Data bus with a width of 16 bits. Data can be transferred in 8-bit and 16-bit units.
Read strobe signal from the host.
Write strobe signal from the host.
Acknowledge signal from the host in response to a drive DMARQ request signal during DMA transfers.
There is no internal pull-up resistor in the pin circuit.
Drive request signal during DMA transfers.
Drive interrupt signal sent to the host.
This signal is asserted by the drive when the drive can support 16-bit transfers.
This signal is not asserted during DMA transfers.
Signal that indicates that the drive has completed response preparation during data transfers.
This signal will be low when preparation has not completed.
Signal asserted by drive 1 to inform drive 0 that the diagnostics have completed. An external pull-up resistor
must be provided.
Reset signal from the host.
There is no internal pull-up resistor in the pin circuit.
Chip select signal from the microcontroller.
Signal that selects the logic of the chip select from the microcontroller.
High - The ZCS signal functions as an active-low signal.
Low - The ZCS signal functions as an active-high signal.
Microcontroller interface control pins. The SUA0 to SUA6 pins are used for addressing.
SUA0 functions as RS (the register select pin) in indirect addressing.
When SUA0 is low, and address read or write operation is performed, and when high, a data read or write
operation is performed.
Signal that selects direct or indirect addressing.
High - Indirect addressing selected.
Low - Direct addressing selected.
When the microcontroller is accessing RAM, the sub-CPU must wait when this pin is low.
Microcontroller data bus. Pull-up resistors are built in.
Interrupt request signal to the microcontroller.
The active level (high or low) can be changed by setting a register. The default setting is active low.
Interrupt request signal from the IDE block to the microcontroller.
LC897194
No. 5572-9/11