CDX-GT49UM/GT490U/GT490US/GT494U
27
• IC Pin Function Description
MAIN BOARD (2/3) IC401 MB90F882PF-G-111E1 (SYSTEM CONTROL)
Pin No. Pin Name I/O Description
1 CYRIL_SEL I Cyril select signal input (L: No cyril select)
2 B-OUT_SEL I Black out setting select signal input (H: Black out)
3 COL SW_SEL I Key illumination initial color setting select signal input (H: Blue)
4 ILLUMI_SEL I Key illumination voltage setting select signal input (H: 10.4 V)
5, 6 NCO O Not used. (Open)
7 NOSE_SW I Front panel detach/attach detect signal input (L: with front panel, H: without front panel)
8 to 10 NCO O Not used. (Open)
11 RE_IN0 I Rotary encoder signal input 0
12 RE_IN1 I Rotary encoder signal input 1
13 X_OUT O Low speed operation clock signal output (32.768 kHz)
14 X_IN I Low speed operation clock signal input (32.768 kHz)
15 VCC Power supply pin (+3.3 V)
16 VSS Ground
17 C Regulator reference capacitor connecting pin
18 UNISI I SONY-BUS data input (Fixed at L in this set)
19 UNISO O Not used. (Open)
20 UNISCK O Not used. (Open)
21 USB_ON O USB over current detect IC control signal output
22 I2C_SIO I/O IIC serial data input/output
23 I2C_SCK O IIC serial clock signal output
24 USB_OVER I USB over current detect signal input
25 BUS_ON O BUS ON signal output (Fixed at L in this set)
26 SYS_RST O System reset signal output
27 CD_ON I CD mechanism servo power supply control request signal input
28 CDM_ON I CD mechanism deck power supply control request signal input
29 ACC_IN I Accessory power supply detect signal input
30 TEL_ATT I Telephone attenuator detect signal input (Fixed at L in this set)
31 ATT O Audio mute control signal output
32 AVCC A/D converter power supply pin (+3.3 V)
33 AVRH A/D converter external reference power supply pin (+3.3 V)
34 RC_IN1 I Rotary commander shift key signal input 1
35 AVSS Ground for A/D converter
36 QUALITY I Not used. (Open)
37 VSM I S meter voltage detect signal input
38 SA_IN I Spectrum analyzer DC input
39 KEY_IN1 I Key signal input 1
40 KEY_IN0 I Key signal input 0
41 RC_IN0 I Rotary commander shift key signal input 0
42, 43 NCO O Not used. (Open)
44 VSS Ground
45 KEY_ACK0 I Key acknowledge detect signal input (Rotary commander)
46 KEY_ACK1 I Key acknowledge detect signal input (Front panel)
47 EXTATT_XEN O
L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the status
of other source)
48 LCD_CE O LCD driver chip enable signal output
49 LCD_SO O LCD driver serial data output
50 LCD_SCK O LCD driver serial clock signal output
51 MOD2 I Micon operation mode setting signal input (active: L)
52 MOD1 I Micon operation mode setting signal input (Fixed at H in this set)
53 MOD0 I Micon operation mode setting signal input (active: H)
54 RESET I Reset signal input
55 AREA_SEL2 I Destination setting pin 2
56 AREA_SEL1 I Destination setting pin 1 (Fixed at L in this set)
57 AREA_SEL0 I Destination setting pin 0 (Fixed at L in this set)
58 WAKE_UP O CD mechanism deck micon wake up signal output
59 MC_RX I MC-BUS communication and CD mechanism deck micon communication RX input
60 MC_TX O MC-BUS communication and CD mechanism deck micon communication TX output
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