Kenwood CKDC-MP575, Servise Manual

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CKDC-MP575
8
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. Pin Name I/O Application
Processing Operation
Remarks
Description
22 TEST_O 1 O TEST MODE O 1 (Not used.)
23 TEST_O 2 O TEST MODE O 2 (Not used.)
24 TEST_O 3 O TEST MODE O 3 (Not used.)
25 TEST_O 4 O TEST MODE O 4 (Not used.)
26 NC O Not used. Low-fixed
27 WAIT I Wait control signal detection
28~30 NC O Not used. Low-fixed
31 RESET I Reset detection H : NORMAL, L : RESET
32 XT1 I Not used.
33 XT2 - Not used.
34 REGC -
35 X2 -
36 X1 I
37 Vss - GND electric potential
38 VDD - 5V electric potential
39 NC O NC Output stopped in standby 3.3V driven
40 WRL I Multiplex WRITE signal 3.3V driven
41,42 NC O Not used. Low-fixed 3.3V driven
43 RD O Multiplex RD signal 3.3V driven
44 ASTB O Multiplex ASTB signal 3.3V driven
45 NC O Not used. Low-fixed 3.3V driven
46 NC O Not used. Low-fixed 3.3V driven
47~54 AD0~AD7 I/O Multiplex address/data 3.3V driven
55 BVdd - Bus interface power supply
56 BVss - Bus interface GND
57~61 AB8~AB12 I/O Multiplex data/address 3.3V driven
62~65 NC O Not used. Low-fixed 3.3V driven
66 CS O Chip select control H : OFF, L : ON 3.3V driven
67 DSP RESET O DSP reset control H : NORMAL, L : RESET 3.3V driven
68~70 NC O Not used. Low-fixed 3.3V driven
71 Avdd -
72 Avss -
73 Avref I A/D port reference voltage input
74 NC I Not used. Low-fixed
75 RAMSEL I
With DRAM/No DRAM switching
H : With DRAM, L : No DRAM
for different models
76 RZM I 0bit MUTE detection H :
≥
1.7V, L : <1.7V
77 LZM I 0bit MUTE detection H :
≥
1.7V, L : <1.7V
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