LC895125Q Datasheet, PDF (5/11 Pages) Sanyo Semicon Device – CD-ROM Driver with On-Chip SCSI Interface and Subcode Functions

LC895125Q, 895125W
Continued from preceding page.
Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection pin
Pin No.
Symbol
Type
Function
51
ZRD
I Microcontroller data read signal input
52
ZWR
I Microcontroller data write signal input
53
ZCS
I Register chip select signal from the microcontroller
54
SUA0
I
55
SUA1
I
56
SUA2
I
57
SUA3
I Microcontroller register selection signals
58
SUA4
I
59
SUA5
I
60
SUA6
I
61
V_SS0
P
62
X1EN
I Selection pin that must be set to 1 when XTALCK1 is used.
63
XTALCK1
I SCSI block oscillator circuit input. Selected by X1EN.
64
XTAL1
O SCSI block oscillator circuit output.
65
V_DD
P
66
V_SS1
P
67
DB0
B
SCSI connection
68
DB1
B
69
V_SS1
P
70
DB2
B
SCSI connection
71
DB3
B
72
V_DD
P
73
V_SS1
P
74
DB4
B
SCSI connection
75
DB5
B
76
V_SS1
P
77
DB6
B
SCSI connection
78
DB7
B
79
V_SS1
P
80
DBP
B SCSI connection
81
V_SS1
P
82
ATN
B SCSI connection
83
V_DD
P
84
BSY
B
SCSI connection
85
ACK
B
86
V_SS1
P
87
RST
B
SCSI connection
88
MSG
B
89
V_DD
P
90
SEL
B
SCSI connection
91
C/D
B
92
V_SS1
P
93
REQ
B
SCSI connection
94
I/O
B
95
V_SS1
P
96
V_DD
P
97
V_SS0
P
98
NC
99
V_SS0
P
100
V_SS0
P
Note: 1. NC pins must be left open. Do not connect any signal to these pins.
2. Pin names that start with Z are negative-logic signals.
3. V_SS0 is the logic system ground and V_SS1 is the SCSI interface ground.
4. Applications that use DRAM must insert resistors in the CAS and RAS lines, connect capacitors between these lines and ground, and take any
other measures necessary to prevent undershoot in the DRAM related circuits.
5. Since these circuits include buffers that sink 48 mA, adequate noise prevention measures must be applied.
Continued on next page.
No. 5241-5/11