Semiconductor Data - Kenwood TK-90 Service Manual

SEMICONDUCTOR DATA /

1. Main Microcomputer: 30625FGPUKBED
(TX-RX unit IC855)
Pin No. Port Name I/O
1 VREF I A/D converter,
D/A converter reference voltage input
2 AVCC I Power source input for A/D converter
3 PDA O PLL IC data
4 PCK O PLL IC clock
5 PEN O PLL IC enable
6 DEN1 O DDS IC1 enable
7 DEN2 O DDS IC2 enable
8 VCO1 O VCO1 changeover instruction
9 VCO2 O VCO2 changeover instruction
10 UL I Unlock detect
11 VEN O VGS-1 enable output
12 VRST O VGS-1 reset output
13 BYTE I External data bus change input
14 CNVSS I Processor mode change input
15 VPLY I VGS-1 PLAY input
16 VBSY I VGS-1 BUSY input
17 RESET I Reset input
18 XOUT O Main clock output
19 VSS I GND
20 XIN I Main clock input
21 VCC1 I Power supply input
22 NMI I NC
23 BKC I Decrease voltage interruption input
24 BOVR I Overvoltage interruption input
25 STPC I Return interruption input by serial data
26 BSFT O Reserve
27 BEEP O Beep encode output
28 AGCSW O AGC voltage discharge control
29 TONE O Side tone encode output
30,31 NC I NC
32 DATA O Common serial data output
33 CLK O Common serial data input
34 RXD2 I Common serial data input for KPE-2
35 TXD2 O Common serial data output for KPE-2
36 TXD1 O Serial data output (PC command)
37 VCC1 I Power supply input
38 RXD1 I Serial data input (PC command / GPS)
39 VSS I GND
40 WCLK I Serial clock input for flash ROM
41 WBSY O BUSY input for flash ROM
42 TXD0 O Serial data output (To panel MCU)
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