Kenwood TK-90, Service Manual

Page: 42 / 142

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