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Pin No.
Name
67
P7
68
TXD3
69
RXD3
70
TXD
71
RXD
73
VDD1
74
RS
75
ER
76
P4
77
PORT3
78
P2
79
A21
80
CD
81
VSS
82
V5IOIS16B
83 ~ 89
A14 ~ A20
90
VDD2
91
VSS
92
P1
93
P0
94 ~ 101
A6 ~ A13
102
VSS
103 ~ 108 A0 ~ A5
109
VDD1
110
DR
111
CS
112
RD
113
SD
114
V5A19
115
V5A14
116
V5A18
117
VSS
118
V5A13
119
V5A17
120
V5A8
121
V5IOWRB
122 ~ 124 V5A9 ~ V5A11
125
INT1
126
VDD2
127
VSS
128
V5D15
129
V5CE1B
130
V5D14
131
V5D7
132
V5IORDB
133
V5D13
134
CD1B
135
V5D6
136
V5D12
137
VDD1
138
VSS
139
V5D5
140
V5D11
141
V5D4
142
V5D3
143
V5OEB
144
V5CE2B
I / O
I
not used
O
not used
I
not used
I
Terminal for serial data transfer (both PC LINK and MODEM)
O
Terminal for serial data transfer (both PC LINK and MODEM)
I
Power supply to Gate array (5 V)
O
RS (Request signal to PC for sending data)
O
ER (Request signal to PC for operation of PC)
O
Control signal (standby) to line receiver/driver IC (IC501)
O
Wait signal to CPU
I
Reset terminal to Gate array (from reset key)
I
Address bus from CPU
I
CD (Information signal from PC to BN Unit (Detection of carrier))
Ground for Gate array
I
CS (OK/NG signal from MODEM in response to RS)
I
Address bus from CPU
I
VDD2
Ground for Gate array
I
Detection of low 5 V power (detection point:4.5 V)
O
Non maskable interrupt signal to CPU
I
Address bus from CPU
Ground for Gate array
I
Address bus from CPU
I
Power supply to Gate array (5 V)
I
DR (OK signal from PC in response to ER)
I
CS (OK/NG signal from PC in response to RS)
I
Data to send from PC to BN Unit passing through the cradle
O
Data to send from BN Unit to PC passing through the cradle
O
not used
O
Address bus to ROM for MODEM
O
Address bus to ROM for MODEM
Ground for Gate array
O
Address bus to ROM for MODEM
O
Address bus to ROM for MODEM
O
Address bus to ROM for MODEM
O
Write signal to ROM for MODEM
O
Address bus to ROM for MODEM
O
Interrupt signal from CPU
I
Power supply to Gate array (3 V)
Ground for Gate array
I/O
not used
O
Chip enable signal to ROM for MODEM
I/O
not used
I/O
Data bus for ROM of MODEM
O
Output enable signal to ROM for MODEM
I/O
not used
I
not used
I/O
Data bus for ROM of MODEM
I/O
not used
I
Power supply to Gate array (5 V)
Ground for Gate array
I/O
Data bus for ROM of MODEM
I/O
not used
I/O
Data bus for ROM of MODEM
I/O
Data bus for ROM of MODEM
O
not used
O
not used
— 43 —
Function
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