Sony SDP-EP70 Service Manual page 54

Pin Name
Pin No.
46
WR
47 RD
48
GNDC
49
NC
50 DSCK/OS1
51
DR
52
DSO
53
DSI/OS0
54 BS
55 X/Y
56
GNDN
57
DS
58
VCCN
59
PS
60 A0
61 A1
62
GNDN
63
A2
64
A3
65 A4
66
VCCQ
67
GNDQ
68
A5
69
VCCN
70
GNDN
71
A6
72 A7
73
A8
74
A9
75
GNDN
76
A10
77 A11
78
A12
79
VCCN
80
A13
81
GNDN
82 A14
83
A15
84
D0
85
D1
86
GNDD
87 D2
88
D3
89
VCCD
90
D4
91
D5
I/O
O Write enable output
O Read enable output
– Ground for bus control
–
Not used
Debug serial clock/Chip status 1 input/output
I/O
I
Debug request input
O
Debug serial output
I/O Debug serial input/Chip status 0 input/output
O Bus strobe output (Not used)
O X/Y select output
–
Ground for address bus
O Data memory select output
– Power supply for address bus
O
Program memory select output
O
Adress data output to S-RAM
O
–
Ground for address bus
O
O Adress data output to S-RAM
O
–
Power supply for interrupt/mode control
–
Ground for interrupt/mode control
Adress data output to S-RAM
O
–
Power supply for address bus
– Ground for address bus
O
O
Adress data output to S-RAM
O
O
Ground for address bus
–
O
O Adress data output to S-RAM
O
– Power supply for address bus
O Adress data output to S-RAM
–
Ground for address bus
O
Not used
O
I/O
Data input/output to S-RAM
I/O
– Ground for data bus
I/O
Data input/output to S-RAM
I/O
– Power supply for data bus
I/O
Data input/output to S-RAM
I/O
– 69 –
Function