Sony CDX-M620 Service Manual page 29

• IC501 MB90574BPMT-G-321-BND (SYSTEM CONTROL) (MAIN BOARD) (US MODEL)
• IC501 MB90574BPMT-G-322-BND (SYSTEM CONTROL) (MAIN BOARD) (AEP, UK, E MODEL)
Pin No. Pin Name
1 – 3 (NCO)
4 SP LATCH
5 ATT
6 SYS RST
7 (NCO)
8 VCC
9 (NCO)
10 E2P SIO
11 E2P CKO
12 FLS SI
13 FLS SO
14 BUS ON
15 BEEP
16 TEL ATT
17 UNI SI
18 UNI SO
19 UNI CKO
20 – 23 (NCO)
24 SIRCS
25 DSP SI
26 DSP SO
27 DSP CKO
28 DSP PLL
29 DSP MST
30 (NCO)
31 VOL ATT
32 TU ATT
33 VSS
34 C
35 DSP LAT
36 DSP RST
37 SHIFT
38 DVCC
39 DVSS
40 FP CTRL
41 (NCO)
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 KEY IN0
47 KEY IN1
48 RC IN0
49 (NCO)
50 QUALITY
51 (NCO)
52 MPTH
53 VSM
54 VCC
55 STBY
56 NS MASK
I/O
O Not used. (Open)
O Spectrum analyzer data latch signal
O System mute signal
O System reset signal
O Not used. (Open)
— Power supply pin (+5 V)
O Not used. (Open)
I/O Tuner unit EEPROM BUS serial data input/output
I/O Tuner unit EEPROM BUS serial clock input/output
I Flash CPU write-in data input
O Flash CPU write-in data output
O BUS ON signal
O Beep signal
I Telephone mute signal
I SONY BUS serial data input
O SONY BUS serial data output
O SONY BUS serial clock output
O Not used. (Open)
I Wireless remote data input
I DSP serial data input
O DSP serial data output
O DSP serial clock output
O DSP PLL clock control signal
O DSP master/slave control signal
O Not used. (Open)
O Electronic volume mute signal
O Not used. (Open)
— Ground
— Not used. (Open)
O DSP latch signal
O DSP reset signal
O OSC frequency shift signal for DC/DC conv.
— Power supply pin (+5 V)
— Ground
O OPEN/CLOSE motor voltage control signal
O Not used. (Open)
— Power supply pin (+5 V)
— Power supply pin (+5 V)
— Ground
— Ground
I Key input 0
I Key input 1
I Rotary commander input 0
O Not used. (Open)
I Noise detection signal
O Not used. (Open)
I Tuner multi path detection signal
I S-meter voltage detection signal
— Power supply pin (+5 V)
O Power amplifier drive signal
O Noise detection ON/OFF control signal
CDX-M620/M670
Pin Description
29