Semiconductor Data; Terminal Function - Kenwood TK-790 Service Manual

TK-790/ ( B
Microprocessor : 784214GCXXX8EU (Control Unit IC516)

• Terminal function

Pin No. Pin name
1 FCLR
2 CK
3 EM
4 MSKE
5 DIN
6 EP
7 SCL
8 SDT
9 VDD
10,11 X2, X1
12 VSS
13 XT2
14 XT1
15 RESET
16 TEST
17 TRD
18 RTM
19 STD
20 EC2
21 DT
22 ACK
23 AVDD
24 AVREF0
25 TI
26 RSI
27 ASQ
28 UL
29 SD
30 RDT
31 RSV2
32 IGN
33 AVSS
34 TO
35 CP
36 AVREF1
37 RXD2
38 TXD2
39 ES
32
) /H ( B )

SEMICONDUCTOR DATA

I/O Action
O Modem FCLR
O Common CLOCK
O D/A converter CS
O Modem MSKE
O Modem DIN
O PLL LE
O DTMF encoder CLOCK
O DTMF encoder DATA
+5V
X'tal
GND
Open
GND
CPU reset
I Serial interface TEST
I Modem TRD
I Modem RTM
I DTMF decoder STD
O Shift register 2 (Control) CS
O Common DATA
O DTMF decoder CLOCK
+5V
+5V
I QT/DQT IN
I RSSI IN
I Analog squelch IN
I PLL UNLOCK
I DTMF decoder SD
I Modem RDT
I Reserved
I Ignition IN
GND
O QT/DQT OUT
O PLL CLOCK
+5V
I Acc RXD
O Acc TXD
O Shift register (TX/RX) CS
Pin No. Pin name I/O
40 RXD1 I Serial interface RXD
41 TXD1 O Serial interface TXD
42 STB O Modem STB
43 EC1 O Shift registerl (Control) CS
44 EI O Shift register (Interface) CS
45 SEL I/O GE-STAR I/O
46 EPT I GE-STAR EPT
47 EMG O GE-STAR EMG
48~71 Flash ROM access port
72 VSS GND
73~74 Flash ROM access port
75 Flash ROM (4Mbit) access port
76 Not used.
77~78 Flash ROM access port
79 POF O Timed Power OFF.
80 Not used.
81 VDD +5V
82 EN2 O D/A converter (Interface) CS
83 CLK O EEPROM CLOCK
84 SDA I/O EEPROM DATA
85 RSV1 O Reserved
86 AI1 I Acc PF Input 1
87 AI2 I Acc PF Input 2
88 AI4 I Acc PF Input 4
89 AI3 I Acc PF Input 3
90 AI5 I Acc PF Input 5
91 2TN I 2tone pulse IN
92 KEY O TX power SW
93 SQ O Acc SQ OUT
L : BUSY, H : Not BUSY
94 TEST GND
95 AO1 O Acc PF Output 1
96 AO2 O Acc PF Output 2
97 AO3 O Acc PF Output 3
98 AO4 O Acc PF Output 4
99 1/2 I Deck 1/2
L : Deck 1, H : Deck 2
100 SFT O Beat shift
Action