Read Sony MEX-BT2900 / MEX-BT2950 Service Manual online
MEX-BT2900/BT2950
30
• IC Pin Function Description
MAIN BOARD IC401 R5F3650MBDZ99FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD_SO
O
Serial data output to the LCD driver
2
LCD_CLK
O
Serial clock signal output to the LCD driver
3
NOSE_SW
I
Front panel remove/attach detection signal input terminal Fixed at “L” in this set
4
SIRCS
I
Remote control signal input from the remote control signal receiver
5
UNISO
O
SONY bus data output to bus interface (BT2900: US and Canadian models only)
6
UNISI
I
SONY bus data input from the bus interface (BT2900: US and Canadian models only)
7
UNISCK
O
SONY bus clock signal output to the bus interface (BT2900: US and Canadian models only)
8
BYTE
I
External data bus width select signal input Connect to VSS in this set
9
CNVSS
I
Flash write signal input terminal Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed operation clock signal input terminal (32.768 kHz)
11
XOUT
O
Low speed operation clock signal output terminal (32.768 kHz)
12
RESET
I
System reset signal input from the reset signal generator and reset switch “L”: reset
13
OSCOUT
O
High speed operation clock signal output terminal (7.92 MHz)
14
VSS
―
Ground terminal
15
OSCIN
I
High speed operation clock signal input terminal (7.92 MHz)
16
VCC1
―
Power supply terminal (+3.3V)
17
NMI
I
Non-maskable interrupt signal input terminal Fixed at “H” in this set
18
RC_IN1
I
Rotary remote commander shift key input terminal
19
BUIN
I
Back up power supply detection signal input terminal “L” is input at low voltage
20
SYSRST
O
Reset signal output terminal
21
BUS_ON
O
SONY bus on/off control signal output to the bus interface
(BT2900: US and Canadian models only)
(BT2900: US and Canadian models only)
22
DEC_SI
I
Serial data input from the CD section
23
DEC_SCK
O
Serial clock signal output to the CD section
24
DEC_SO
O
Serial data output to the CD section
25 to 27
NCO
O
Not used
28
BEEP
O
Beep sound drive signal output to the power amplifi er
29
I2C_SCK
O
IIC serial clock signal output terminal
30
I2C_SIO
I/O
IIC two-way serial data bus terminal
31
FW_TXD
O
Flash writer data output terminal
32
FW_RXD
I
Flash writer data input terminal
33
FW_CLK
I
Flash writer clock signal output terminal
34
FW_BUSY
O
Flash writer busy signal output terminal
35
BT_API_TX
O
Not used
36
BT_API_RX
O
Not used
37
DRV_ON
O
Driver control signal output to the CD section
38
MEC_LOAD
O
Motor (Loading) signal output to the CD section
39
MEC_EJECT
O
Motor (Eject) signal output to the CD section
40
CDON_1500MV
O
CD servo power supply control signal output to the CD section
41
EPM
O
EPM signal output terminal Fixed at “L” in this set
42
MEC_INSW
I
Detection signal input from the CD section (in switch)
43
MEC_LIMIT
I
Detection signal input from the CD section (limit switch)
44
MEC_DSW
I
Detection signal input from the CD section (D switch)
45
DEC_INT
I
Request signal input from the CD section
46
CE
O
Chip enable signal output terminal Fixed at “H” in this set
47, 48
NCO
O
Not used
49
DEC_XMUTE
O
Muting on/off control signal output to the CD section “L”: muting on
50
NCO
O
Not used
51
CD_ZDET
I
Zero detection signal input from the CD section
52
CD_XCCE
O
Chip enable signal output to the CD section
53
DEC_SSTBY
O
SRAM standby mode control signal output to the CD section
54
DEC_RST
O
Reset signal output to the CD section
55
BT_ATT_XEN
O
Not used
56
TELATT
I
Telephone attenuator detection signal input terminal
57
ACC_IN
I
Accessory power detection signal input terminal “L”: accessory power on
58
ATT
O
Muting on/off control signal output terminal “H”: muting on
59
DIAG
I
Diagnostic signal input from the power amplifi er
Click on the first or last page to see other MEX-BT2900 / MEX-BT2950 service manuals if exist.