Kenwood FGZ000UF2, Service Manual

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FGZ000UF2
12
MICROCOMPUTER’S TERMINAL DESCRIPTION
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GRAPHIC CONTROLLER : IC4 (X25 : ELECTRIC UNIT)
Pin No. Pin Name I/O Processing Operation Description
1 DREQ O DMA request
2, 3 D0, D1 I/O CPU data
4 CVCC1 - Power supply
5 D2 I/O CPU data
6 CGND1 - Ground
7~11 D3~D7 I/O CPU data
12 CGND2 - Ground
13~15 D8~D10 I/O CPU data
16 CVCC2 - Power supply
17, 18 D11, D12 I/O CPU data
19 CGND3 - Ground
20~22 D12~D15 I/O CPU data
23 PGND - Ground
24 CAP0 - External volume terminal for communication circuit
25 PVCC - Power supply
26 CS0 I/O Chip selection 0 (UGM)
27 CS1 I/O Chip selection 1 (Internal register)
28 RD I Read strobe
29 WE0 I Write pulse 0 (lower side)
30 WE1 I Write pulse 1 (upper side)
31 DACK I DMA acknowledge
32 MODE0 I Operation mode terminal 0
33 MODE1 I Operation mode terminal 1
34 MODE2 I Operation mode terminal 2
35 TEST I Test terminal
36 RESET I Reset
37 CLK0 I Q2i operation clock
38 GND1 - Ground
39, 40 A1, A2 I CPU address
41 VCC1 - Power supply
42~49 A3~A10 I CPU address
50 GND2 - Ground
51~60 A11~A20 I CPU address
61, 62 A21, A22 - Not connected
63 GND3 - Ground
64~68 MD0~MD4 I/O Memory data
69 GND4 - Ground
70 MD5 I/O Memory data
71 VCC2 - Power supply
72~78 MD6~MD12 I/O Memory data
79 GND5 - Ground
80, 81 MD13, MD14 I/O Memory data