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CDX-M620/M670
• 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 I/O Pin Description
1 – 3 (NCO) O Not used. (Open)
4 SP LATCH O Spectrum analyzer data latch signal
5 ATT O System mute signal
6 SYS RST O System reset signal
7 (NCO) O Not used. (Open)
8 VCC — Power supply pin (+5 V)
9 (NCO) O Not used. (Open)
10 E2P SIO I/O Tuner unit EEPROM BUS serial data input/output
11 E2P CKO I/O Tuner unit EEPROM BUS serial clock input/output
12 FLS SI I Flash CPU write-in data input
13 FLS SO O Flash CPU write-in data output
14 BUS ON O BUS ON signal
15 BEEP O Beep signal
16 TEL ATT I Telephone mute signal
17 UNI SI I SONY BUS serial data input
18 UNI SO O SONY BUS serial data output
19 UNI CKO O SONY BUS serial clock output
20 – 23 (NCO) O Not used. (Open)
24 SIRCS I Wireless remote data input
25 DSP SI I DSP serial data input
26 DSP SO O DSP serial data output
27 DSP CKO O DSP serial clock output
28 DSP PLL O DSP PLL clock control signal
29 DSP MST O DSP master/slave control signal
30 (NCO) O Not used. (Open)
31 VOL ATT O Electronic volume mute signal
32 TU ATT O Not used. (Open)
33 VSS — Ground
34 C — Not used. (Open)
35 DSP LAT O DSP latch signal
36 DSP RST O DSP reset signal
37 SHIFT O OSC frequency shift signal for DC/DC conv.
38 DVCC — Power supply pin (+5 V)
39 DVSS — Ground
40 FP CTRL O OPEN/CLOSE motor voltage control signal
41 (NCO) O Not used. (Open)
42 AVCC — Power supply pin (+5 V)
43 AVRH — Power supply pin (+5 V)
44 AVRL — Ground
45 AVSS — Ground
46 KEY IN0 I Key input 0
47 KEY IN1 I Key input 1
48 RC IN0 I Rotary commander input 0
49 (NCO) O Not used. (Open)
50 QUALITY I Noise detection signal
51 (NCO) O Not used. (Open)
52 MPTH I Tuner multi path detection signal
53 VSM I S-meter voltage detection signal
54 VCC — Power supply pin (+5 V)
55 STBY O Power amplifier drive signal
56 NS MASK O Noise detection ON/OFF control signal
