Sony CDX-H910UI Service Manual page 29

• IC Pin Function Description
MAIN BOARD (3/3) IC501 MB90F883AHPF-G-104E1 (SYSTEM CONTROL)
Pin No. Pin Name
1 CYRIL_SEL
2 B-OUT_SEL
3 COL_SW
4 ILLUMI_SEL
5 DOOR_SW
6 DOOR_IND
7 to 10 NCO
11 RE IN0
12 RE IN1
13 X_OUT
14 X_IN
15 VCC
16 VSS
17 C
18 UNISI
19 UNISO
20 UNISCK
21 NCO
22 I2C_SIO
23 I2C_SCK
24 NCO
25 ACC_IN
26 TEL_ATT
27 ATT
28 BUS_ON
29 SYS_RST
30 CD_ON
31 CDM_ON
32 AVCC
33 AVRH
34 RC_IN1
35 AVSS
36 NCO
37 VSM
38 SA_IN
39 KEY_IN1
40 KEY_IN0
41 RC_IN0
42, 43 NCO
44 VSS
45 KEY_ACK0
46 KEY_ACK1
47 NCO
48 LCD_CE
49 LCD_SO
50 LCD_SCK
51 MD2
52 MD1
53 MD0
54 RESET
55 AREA_SEL2
56 AREA_SEL1
57 AREA_SEL0
I/O
I Cyrillic setting terminal
I Black out setting terminal
I Initial color setting terminal
— Not used. (Pull down)
I Front panel open detection signal input
O Front panel open indicator drive signal output
— Not used. (Open)
I Rotary encoder signal input from Front panel
I Rotary encoder signal input from Front panel
O Low speed operation clock signal output (32.768kHz)
I Low speed operation clock signal input (32.768kHz)
— Power supply (+3.3V)
— Ground
— Capacitor connected terminal
I S-BUS serial data signal input
O S-BUS serial data signal output
O S-BUS serial clock signal output
— Not used. (Open)
I/O I2C serial data signal input/output
O I2C serial clock signal output
— Not used. (Open)
I Accessory power supply detection signal input
I Telephone attenuate detection signal input
O Audio mute control signal output
O S-BUS ON signal output
O System reset signal output
I CD mechanism servo power supply control request signal input
I CD mechanism deck power supply control request signal input
— A/D converter power supply (+3.3V)
— A/D converter external reference power supply (+3.3V)
I Rotary command signal input from Remote in
— Ground for A/D converter
— Not used. (Open)
I S meter voltage detection signal input
I Spectrum analyzer/electronic volume DC signal input
I Key signal input 1
I Key signal input 0
I Rotary command signal input from Remote in
— Not used. (Open)
— Ground
I Acknowledge detection signal input from Rotary commander
I Acknowledge detection signal input from Front panel button
— Not used. (Open)
O Liquid crystal display driver chip enable signal output
O Liquid crystal display driver serial data signal output
O Liquid crystal display driver serial clock signal output
I Mode setting terminal
I Mode setting terminal
I Mode setting terminal
I Reset signal input
I Destination setting terminal
I Destination setting terminal
I Destination setting terminal
Description
"H": Cyrillic ON, "L": Cyrillic OFF
"H": Block out ON, "L": Block out OFF
"H": Blue, "L": Red
CDX-H910UI/HR910UI
29