Sony CDX-GT31MP Service Manual page 31

• IC Pin Function Description
MAIN BOARD (2/3) IC501 R5F3650KBDZ88FA (SYSTEM CONTROL)
Pin No. Pin Name
1 LCD_SO
2 LCD_CLK
3 NOSE_SW
4 SIRCS
5 NCO
6 NCO
7 NCO
8 BYTE
9 CNVSS
10 XIN
11 XOUT
12 RESET
13 OSCOUT
14 VSS
15 OSCIN
16 VCC1
17 NMI
18 RC_IN1
19 BUIN
20, 21 NCO
22 DEC_SI
23 DEC_SCK
24 DEC_SO
25, 26 NCO
27 DRV_ON
28 BEEP
29 I2C_SCL
30 I2C_SDA
31 FW_TXD
32 FW_RXD
33 FW_CLK
34 FW_BUSY
35 to 37 NCO
38 MEC_LOAD
39 MEC_EJECT
40 CDON_1500MV
41 EPM
42 MEC_INSW
43 MEC_LIMIT
44 MEC_DSW
45 DEC_INT
46 CE
47 HIT2_SDA
48 HIT2_SCL
49 HIT2_RESET
50 DEC_XMUTE
51 CD_ZDET
52 CD_XCCE
53 DEC_SSTBY
54 DEC_RST
55, 56 NCO
57 ACC_IN
58 ATT
59 DIAG
60 AMPSTB
61 NCO
CDX-GT31MP/GT260MP/GT267ME/GT310MP/GT313MP
I/O
O Serial data output for LCD driver
O Serial clock signal output for LCD driver
I Front panel detach/attach detect signal input
I Remote control signal (infrared) input
O Not used. (Open)
O Not used. (Fixed at L.)
O Not used. (Open)
I External data bus width select signal input (Connect to VSS in this set)
I Flash writer IF (CNVSS) signal input (L: normally operation, H: fl ash write)
I Low speed operation clock signal input (32.768 kHz)
O Low speed operation clock signal output (32.768 kHz)
I System reset signal input
O High speed operation clock signal output (7.92 MHz)
― Ground terminal
I High speed operation clock signal input (7.92 MHz)
― Power supply terminal (+3.3 V)
I Non-maskable interrupt signal input (Fixed at H in this set)
I Rotary commander shift key signal input
I Backup power supply detect signal input
O Not used. (Open)
I Decorder data signal input
O Decorder clock signal output
O Decorder data signal output
O Not used. (Open)
O Driver control signal output
O Beep signal output for the power amplifi er IC
O IIC communication serial clock signal output
I/O IIC communication serial data input/output
O Flash software serial data output/System monitor output
I Flash software serial data input
I Flash software serial clock input for synchronous writing
O Flash software busy signal output for synchronous fl ashing
O Not used. (Open)
O CD mechanism deck motor loading signal output
O CD mechanism deck motor eject signal output
O Servo power supply control signal output
O EPM signal output (Fixed at L in this set)
I Mechanism deck pack in detection switch signal input
I Mechanism deck sled limit in detection switch signal input
I Mechanism deck chacking end detection switch signal input
I Decoder request signal input
I Clip enable signal input (Fixed at H in this set)
I/O Tuner serial data input/output
O Tuner serial clock output
O Tuner reset signal output
O Decorder mute signal output
I Zero detect signal input
O Servo/decorder clip enable signal output
O Decorder SRAM standby signal output
O Decorder reset signal output
O Not used. (Open)
I Accessory power supply detect signal input
O Audio mute control signal output
I Status signal input from power amp IC
O Standby signal output for power regulator IC
I Not used. (Open)
Description
"L": With panel, "H": Without panel
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