Specifications

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