Aiwa CDC-R504MP Service Manual page 17

• IC501 MN101E01KSH (SYSTEM CONTROL) (MAIN BOARD (1/2))
Pin No. Pin Name
1 DAVDD
2 BBE-MP
3 DAVSS
4 to 6 NCO
7 UNISO
8 UNISI
9 UNICKO
10 VDD1
11 MMOD
12 OSCOUT
13 OSCIN
14 VSS1
15 XIN
16 XOUT
17 VDD2
18 MOD1
19 RESET
20 NCO
21 ACC IN
22 TEST IN
23 TEL ATT
24 ATT
25 XKEYON
26 NCO
27 KEYACK
28 TU ATTIN
29, 30 NCO
31 BUIN
32 to 35 NCO
36 BUSON
37 SYSRST
38 EJECT OK
39 to 41 NCO
42 Z MUTE
43 to 46 NCO
47 CD ON
48 CDM ON
49, 50 NCO
51 AREASEL1
52 AREASEL2
53 AREASEL3
54 LCD CTL
55, 56 NCO
57 DSSA
58 PANEL SW
59 DIAG
60 VOLATT
61, 62 NCO
63 VSS2
64 TU ATT
65 NCO
I/O
— Power supply pin for D/A output converter (+3.3 V)
O Not used in this set. (Open)
— Ground pin for D/A output converter
O Not used in this set. (Open)
O SONY-BUS data signal output
I SONY-BUS data signal input
O SONY-BUS clock signal output
— Power supply pin for internal core (+3.3 V)
I Flash microcomputer write detection signal input Not used in this set.
O High speed operation clock signal output (27 MHz)
I High speed operation clock signal input (27 MHz)
— Ground pin for internal core
I Low speed operation clock signal input (32.768 kHz)
O Low speed operation clock signal output (32.768 kHz)
— Power supply pin for internal core (+3.3 V)
— Pull up: "H"
I Reset signal input
O Not used in this set. (Open)
I Accessory power supply detection signal input
I Test mode detection signal input
I Telephone attenuate detection signal input
O Audio mute control signal output
O Key power supply control signal output Not used in this set. (Open)
O Not used in this set. (Open)
I Key acknowledge detection signal input
I Tuner mute ZERO cross detection signal input
O Not used in this set. (Open)
I Back up power supply detection signal input
O Not used in this set. (Open)
O BUS on signal output
O System reset signal output
O CD servo IC eject OK signal output
O Not used in this set. (Open)
I Mechadeck mute zero cross detection signal input L/R
O Not used in this set. (Open)
I CD mechanism power supply control signal input ("H": Power on)
I CD mechanism deck power supply control signal input ("H": Power on)
O Not used in this set. (Open)
I Destination function setting input 1
I Destination function setting input 2
I Destination function setting input 3
"H" output: LCD unit and key confusion, power off
O
"L" output: LCD unit and key confusion, power on
O Not used in this set. (Open)
O DSSA on/off change signal output (Cut off rear)
I Front panel attachment detection signal input "L": with panel, "H": without panel
I Condition signal input from the power IC
O Electronic volume attenuate control signal output
O Not used in this set. (Open)
— Ground pin for I/O port
O Tuner mute control signal output
O Not used in this set. (Open)
CDC-R504MP/X504MP
Pin Description
17