Kenwood TK-90 Service Manual page 42

TK-90
Pin No. Port Name I/O
43 RXD0 I
44 RBK O
45 ABK O
46 AMU O
47 TXC O
48 CKY O
49 MMU2 O
50 MMU1 O
51 SELC O
52 WEPM I
53 NC O
54~56 IEN1~IEN3 O
57 IEN4 O
58 REN O
59,60 NC O
61 WCE I
62 PSENSE I
63 VOXS O
64 VOXO I
65 TTI I
66 TSI I
67 TTO O
68 TSO O
69 NC O
70 KEY I
71 DPTT I
72~74 AUX1~AUX3 I/O
75 FSL I
76 SELADJ O
77 SELRX I
78 SELTX O
79 FEN O
80 PSC O
81~84 TYP0~TYP3 I
85 VCC2 I
86 NC O
87 VSS I
88 EEN O
89 EDA I
90 ECK O
91 ESI O
92 CTS2 I
93 RTS2 O
42
SEMICONDUCTOR DATA /
Function
Serial data input (From panel MCU)
RF blanking control
Audio blanking control
Audio mute control
Transmission power supply control
Transmission power output control
DI audio mute control
Microphone audio mute control
SELCALL power source ON/OFF control
EPM input for flash ROM
NC
A/D converter IC (TX-RX unit) enable
Expansion I/O IC (TX-RX unit) enable
Expansion I/O IC (TX-RX unit) enable
NC
WCE input for flash ROM
NC
VOX circuit changeover data output control
VOX transmission instruction
TT signal input (For Auto antenna tuner)
TS signal input (For Auto antenna tuner)
TT signal output (For Auto antenna tuner)
TS signal output (For Auto antenna tuner)
NC
CW key input
DATA PTT input
Programmable AUX terminal 1~3
Detection input of FSK
Center frequency adjustment control
of FSK modem
SELCALL receive data input
SELCALL transmit data output
Expansion I/O IC (Final unit) enable
Power switch control
Destination port 0~3
Power supply input
NC
GND
EEPROM enable
EEPROM data input
EEPROM clock output
EEPROM data output
Reserve
Reserve
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RP k`
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RT fbkQ
RU obk
RVISM k`
SN t`b
SO mpbkpb
SP slup slu
SQ slul slu
SR qqf qq
SS qpf qp
ST qql qq
SU qpl qp
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TN amqq
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TT pbiou
TU pbiqu
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