lc898023kw Sanyo Semiconductor Corporation, lc898023kw Datasheet - Page 10

• Manufacturer Part Number: lc898023kw
• Description: 40? Playback/16? Write Cd-r/rw Encoder/decoder Ic With Built-in Scsi Interface
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
<SCSI Interface Pins>
<Microcontroller Interface Pins>
<Buffer RAM Pins>
1. Analog Interface Pins
BSY, ACK, MSG, SEL, REQ, ATN, RST, I/O, C/D (input/output)
DB0 to DB7, DBP (input/output)
CS (input)
RD, WR (input)
SWAIT (input)
SUA0 to SUA7 (input)
D0 to D7 (input)
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)
CCS (input)
RREC (input)
FE (input)
TE (input)
VREF (input)
SCIS bus control.
SCSI data bus.
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 kΩ (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.)
Midpoint servo input pin.
Optical discrimination input.
Focus error signal input.
Tracking error signal input.
Input for the servo system reference voltage.
LC898023KW, 898023KL
No. 6614-10/13