Sony CDX-M850MP Service Manual page 21

• IC303 M30626FHPGP-054 (SYSTEM CONTROL) (MAIN Board (2/2))
Pin No. Pin Name
1 SIRCS
2 FP CTRL
3 CD SO/TSO
4 CD SI/TSI
5 CD CKO/TCKO
6 BYTE
7 CNVSS
8 XIN
9 XOUT
10 RESET
11 OSC OUT
12 VSS
13 OSC IN
14 VCC1
15 NMI
16 CD PACK
17 DAVN
18 BU IN
19 NS MASK
20 BEEP
21 FLW IN
22 NCO
23 SA CLK
24 TEL ATT
25 ATT
26 VOL ATT
27 I2C CKO
28 I2C SIO
29 UNI SO
30 UNI SI
31 UNI CKO
32 TUNER ATT
33 EESIO
34 EECKO
35 NCO
36 ADSO1
37 ADSO2
38 NCO
39 HOLD
40 AMP DIAG
41 AMP STB
42 AMP ON
43 TUNER ON
44 WRI/WR
45 CD LIMIT
46 CD D SW
47 CD PH1
48 CD INSW/PH2
49 PH3
50 DST SEL1
51 DST SEL2
52 CD LM LO
I/O
I Remote control data input
O Front panel open/close speed control signal
O CD servo serial data output
I CD servo serial data input
O CD servo serial clock output
I L fixed terminal
I Flash write-in signal input
I Sub clock signal input (32kHz)
O Sub clock signal output (32kHz)
I CPU reset signal input
O Main clock signal output (6MHz)
— Ground
I Main clock signal input (6MHz)
— Power supply pin (+5V)
I Non maskable interrupt signal input
I CD text pack synchronized signal input
I RDS data acquisition detect signal
I Back-up power detect signal
O Noise mask signal output
O Beep signal output
I OSC frequency shift signal for DC/DC conv.
O Not used. (Open)
O Spectrum analyzer clock signal output
I telephone mute detect signal input
O Mute signal output
O Electronic volume mute signal output
O Tuner/E-volume BUS clock output
O Tuner/E-volume BUS data output
O SONY BUS data output
I SONY BUS data input
O SONY BUS clock output
O Tuner attenuate signal output
I/O EEPROM data input/output
O EEPROM clock output
O Not used. (Open)
O Not used. (Open)
O Not used. (Open)
O Not used. (Open)
I Flash write-in signal input
I Amplifier diagnosis signal input
O Amplifier strobe signal output
O Not used. (Open)
O Not used. (Open)
I Flash write-in signal input
I CD limit detect signal input
I CD disc SW detect signal input
I CD PH1 detect signal input
I CD IN SW/PH2 detect signal input
I CD PH3 detect signal input
I Destination select signal input
I Destination select signal input
O CD loading motor control signal output
Pin Description
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
CDX-M850MP
21