LC895125Q Datasheet, PDF (8/11 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
V_SS0
P
52
ZSWAIT
O WAIT signal output to the microcontroller
53
ZINT0
O Interrupt request output to the microcontroller (ECC side. Set with a register.)
54
V_DD
P
55
V_SS0
P
56
ZINT1
O Interrupt request output to the microcontroller (SCSI side. Set with a register.)
57
ZRD
I Microcontroller data read signal input
58
NC
59
ZWR
I Microcontroller data write signal input
60
ZCS
I Input for the register chip select signal from the microcontroller
61
SUA0
I
62
SUA1
I
63
SUA2
I
64
SUA3
I Microcontroller register selection signals
65
SUA4
I
66
SUA5
I
67
SUA6
I
68
V_SS0
P
69
X1EN
I Selection pin that must be set to 1 when XTALCK1 is used
70
XTALCK1
I SCSI block oscillator circuit input. Selected by X1EN.
71
XTAL1
O SCSI block oscillator circuit output
72
V_SS0
P
73
V_DD
P
74
V_SS1
P
75
DB0
B
SCSI connection
76
DB1
B
77
V_SS1
P
78
DB2
B
SCSI connection
79
DB3
B
80
NC
81
V_DD
P
82
V_SS1
P
83
DB4
B
SCSI connection
84
DB5
B
85
V_SS1
P
86
DB6
B
SCSI connection
87
DB7
B
88
V_SS1
P
89
DBP
B SCSI connection
90
V_DD
P
91
V_SS1
P
92
NC
93
ATN
B SCSI connection
94
V_DD
P
95
BSY
B
SCSI connection
96
ACK
B
97
V_SS1
P
98
RST
B
SCSI connection
99
MSG
B
100
V_DD
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.
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