Kenwood TK-80 Service Manual page 23

TK-80
Pin No. Pin Name Port Name I/O
41 RD P21
42 WR P20
43~50 D7~D0 P17~P10
51 BSY P07
52 KEY P06
53 KYS P05
54 ODEN P04
55 TSI P03
56 TTI P02
57 ATI P01
58 THP P00
59 TXD TXD1
60 RXD RXD1
61 RTS P85
62 CTS CTS1
63 ABSL TXD0
P83
64 FSD RXD0
65 P81 P81
66 CTS0 CTS0
67 Vcc Vcc
68 AVcc AVcc
69 Vref Vref
70 AVss AVss
71 Vss Vss
72 POD1 AN7
73 POD2 AN6
74 VSRM AN5
75 VCL AN4
76 VSQL AN3
77 VSFM AN2
78 SM AN1
79 VDLY AN0
80 SS P67
I/O Port: UPD71055GB-3B4 (Control unit IC7)
Pin No. Pin Name Port Name I/O
1 NC NC
2 CS CS
3 GND GND
22
SEMICONDUCTOR DATA
O Expansion I/O RD signal. H: Normal, L: RD
O Expansion I/O WR signal. H: Normal, L: WR
O False data path
O Packet busy output. H: Busy, L: Normal
I Key input. H: No input, L: Input
I Key plug attachment decision. H: Attached, L: Not attached
O Expansion I/O reset output. H: Reset, L: Normal
I External AT control input
I External AT control input
I Internal AT attachment decision. H: Not attached, L: Attached
I Power down request during temperature protection. H: Protection actuation, L: Normal
O Uart data output
I Uart data input
O Uart reception authorization output. H: Reception not allowed, L: Reception allowed
I Uart transmission authorization output. H: Transmission not allowed, L: Transmission allowed
O Selective call code transmission uart data output
O Local DDS, PLL register selection. H: Register B, latch V1, L: Register A, latch V2
I Selective call uart data input
I GND
I Selective call transmission authorization input. H: Transmission not allowed, L: Transmission allowed
I Power supply
I A/D power supply
I A/D reference power supply
I A/D GND
I GND
I Variable condenser 1 VR, A/D input
I Variable condenser 2 VR, A/D input
I Reflection wave voltage, A/D input
I Clarifier VR, A/D input
I Squelch VR, A/D input
I RF meter voltage (progression wave voltage), A/D input
I S-meter voltage, A/D input
I VOX delay VR, A/D input
I Send switch input. H: No input, L: Input
- Not used
I Chip select input
I GND
Description
Description