Kenwood TS-2000 Service Manual page 35

No. Name I/O
84 Vcc I 3.3V.
85 EXTAL I Crystal oscillator 11.0592MHz.
86 Vss – GND.
87,88 NC I
89 PVcc I 3.3V.
90 PHD I Phase comparison detection instruction
input.
91 Vss – GND.
92 NC O
93 HRD O External address space lead pin.
Normally : H
94 HWR O External space write strobe (D15~D8).
95 BACKUP I Voltage reduction interrupt.
96 WAIT I Bus cycle wait state request.
97 FEN2 O Final serial-parallel enable 2 (AT).
98 FEN1 O Final serial-parallel enable 1 (LPF).
99,100 NC –
101 Avcc I 5V.
102 VREF I 5V.
103 MSM I Main SM voltage input.
104 SSM I Sub SM voltage input.
105 AXC I SW (VSF/MALT).
106 AYC I SW (VSR/SALT).
107 AZC I SW (MSQ/SMQ).
SEMICONDUCTOR DATA
Function
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
No. Name I/O
BXC I SW (MPU/MDN/ALC/Reserve).
BYC I SW (THHF/THU/TH12/TEST).
PCHECK I Panel CPU connection check input signal.
DTDT I DTMF decoder data input.
NAR I VS-3 serial data input permission judgment.
EOM I DRU-3 message end judgment.
KYS I Key jack connection judgment.
CTS0 I UART operation instruction input from
main unit panel.
KEY I Key down instruction.
PKSA I Packet transmission instruction input.
SS I PTT transmission instruction input.
AVss – GND.
LICS O Input latch control chip select.
LOCS O Output latch control chip select.
DTSTD I DTMF decoder analysis end signal.
EDA I EEPROM data input.
EEN O EEPROM enable.
RST0 O UART operation instruction output to
main unit panel.
RXD3 I Data input from TNC.
TXD3 O Data output to TNC.
MD0 I Operation mode setting pin 0.
Connect to Vss.
TS-2000/X
Function
35