Read Sony CDX-GT26 Service Manual online
CDX-GT26
27
• IC Pin Function Description
MAIN BOARD (2/3) IC401 R5F3650KBDZ93FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD_SO
O
Serial data signal output to LCD driver
2
LCD_CLK
O
Serial clock signal output to LCD driver
3
NOSE_SW
I
Front-panel detach/attach detect signal input/output "L": with Panel, "H": without Panel
4
SIRCS
I
Remote-control signal (infrared) input
5
UNISO
O
SONY-BUS data output
6
UNISI
I
SONY-BUS data input
7
UNISCK
O
SONY-BUS clock output
8
BYTE
I
MCU setting terminal
9
CNVSS
I
Input pin to switch U-com mode
10
XIN
I
Low-speed clock input (32.768kHz)
11
XOUT
O
Low-speed clock output (32.768kHz)
12
RESET
I
U-com reset signal input
13
OSCOUT
O
High-speed clock output (7.92MHz)
14
VSS
—
Ground pin
15
OSCIN
I
High-speed clock input (7.92MHz)
16
VCC1
—
Power supply pin (+3.3 V)
17
NMI
I
MCU setting terminal
18
RC_IN1
I
Rotary commander SHIFT key signal input
19
BUIN
I
Backup power detect signal input
20
SYSRST
O
SYSTEM RESET signal output Not used. (Open)
21
BUSON
O
VBUS power control signal output Not used. (Open)
22
DEC_SI
I
Decoder data signal input
23
DEC_SCK
O
Decoder clock signal output
24
DEC_SO
O
Decoder data signal output
25 to 27
NCO
O
Not used. (Open)
28
BEEP
O
BEEP signal output to power amplifi er
29
I2C_SCK
O
IIC bus serial clock output
30
I2C_SIO
I/O
IIC bus serial data input/output
31
FW_TXD
O
Flash software (Serial data output) /System monitor signal output
32
FW_RXD
I
Flash software (Serial data input)
33
FW_CLK
I
Serial clock input for synchronous writing
34
FW_BUSY
O
Busy signal output for synchronous fl ashing
35
BT_API_TX
O
Not used. (Open)
36
BT_API_RX
O
Not used. (Open)
37
DRV_ON
O
Driver control signal output
38
MEC_LOAD
O
CD mechadeck moter (Load) signal output
39
MEC_EJECT
O
CD mechadeck moter (Eject) signal output
40
CDON_1500MV
O
Servo power control signal output
41
EPM
O
EPM signal output
42
MEC_INSW
I
Mechadeck in_switch signal input
43
MEC_LIMIT
I
Mechadeck (OP) limit_switch signal input
44
MEC_DSW
I
Mechadeck D_switch signal input
45
DEC_INT
I
Decoder request signal input
46
CE
O
Chip enable signal output
47, 48
NCO
O
Not used. (Open)
49
DEC_XMUTE
O
Decoder mute signal output
50
NCO
O
Not used. (Open)
51
CD_ZDET
I
CD zero detect signal input
52
CD_XCCE
O
CD servo/decoder chip enable signal output
53
DEC_SSTBY
O
Decoder SRAM Standby signal output
54
DEC_RST
O
Decoder Reset signal output
55
BT_ATT_XEN
O
CD mute signal output Not used. (Open)
56
TELATT
I
TELEPHONE ATTENUATOR detect signal input (AEP, UK model)
57
ACC_IN
I
Accessory power detect signal input
58
ATT
O
Audio mute control signal output
59
DIAG
I
POWER amplifi er status signal input
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