lc898093 Sanyo Semiconductor Corporation, lc898093 Datasheet - Page 11

• Manufacturer Part Number: lc898093
• Description: 40 ? Playback/12 ? Write Cd-r/rw Encoder/decoder Ic With Built-in Atapi Interface
• Manufacturer: Sanyo Semiconductor Corporation

<Microcontroller Interface Pins>
<Buffer RAM Pins>
1. Analog Interface Pins
IORDY (output)
PDIAG (input/output)
HRST (input)
CS (input)
RD, WR (input)
SWAIT (input)
SUA0 to SUA7 (input)
D0 to D7 (input/output)
INT0, INT1 (output)
I/O0 to I/O15 (input/output)
RA0 to RA9 (output)
RAS0, RAS1, RAS2 (output)
CAS0, CAS1 (output)
OE (output)
UWE, LWE (output)
RREC (input)
FE (input)
TE (input)
VREF (input)
Indicates that the drive is ready to respond. Used during data transfers.
This signal will be low when the drive is not ready.
Signal asserted by drive 1 to indicate to drive 0 that diagnostics have completed.
Reset signal from the host. The IDE interface is reset by a low-level input to this pin.
Chip select signal from the microcontroller. The microcontroller interface is active when this pin is low.
Connect the microcontroller read and write lines to these inputs.
Wait signal output to the microcontroller. When accessing buffer RAM, the microcontroller must wait if this pin is
low.
Internal register address lines
Microcontroller data bus. These pins have built-in pull-up resistors.
Interrupt request signals output to the microcontroller. INT1 can be set to output the ATAPI interrupt by setting
INT1EN (Conf-R11 bit 7)
These are open drain outputs with built-in 80 k (at room temperature, 5 V) pull-up resistors.
Buffer RAM data bus. These pins have built-in pull-up resistors.
Buffer RAM address lines.
Buffer DRAM RAS outputs. Normally, RAS0 is used. However, if two 16-Mbit DRAMs are used, connect the RAS0
and RAS1 lines to the RAS pins on the DRAMs. If four 16-Mbit DRAMs are used, connect the RAS0, RAS1, RAS2,
and LWE lines to the RAS pins on the DRAMs.
Buffer DRAM CAS outputs. Normally, CAS0 is used. However, if two 16-Mbit DRAMs are used, connect the CAS0
output to the CAS pins on the DRAMs. If 2-CAS type DRAMs are used, connect CAS0 to UCAS and CAS1 to
LCAS.
Buffer RAM read output.
Buffer RAM write outputs. Connect these to the corresponding pins. If 2-CAS type DRAMs are used, UWE must be
connected. (Leave LWE open.)
Optical discrimination input.
Focus error signal input.
Tracking error signal input.
Input for the servo system reference voltage.
LC898093
No. 6495-11/14