Sony MEX-BT39UW Service Manual page 33

• IC Pin Function Description
MAIN BOARD IC501 R5F3650KBDZ95FA (SYSTEM CONTROLLER)
Pin No. Pin Name
1 LCD_SO
2 LCD_CLK
3 NOSE_SW
4 SIRCS
5 UNISO
6 UNISI
7 UNISCK
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 SYSRST
21 BUS_ON
22 MC_RX
23 NCO
24 MC_TX
25 NCO
26 SYNC_OUT
27 NCO
28 BEEP
29 I2C_SCK
30 I2C_SIO
31 FW_TXD
32 FW_RXD
33 FW_CLK
34 FW_BUSY
35, 36 NCO
37 CD_ON
38 CDM_ON
39 WAKE_UP
40 Z_MUTE
41 EPM
MODELNAME_SEL0
42 to 45 to
MODELNAME_SEL3
46 CE
47 NCO
48 SA_DATAIN
49 SA_CLKOUT
50 USBON
51 VBUS_ON
52 USB_OVR
53 EXTATT_XEN
54, 55 NCO
56 TELATT
57 ACC_IN
58 ATT
I/O
O Serial data output to the LCD driver
O Serial clock signal output to the LCD driver
I Front panel remove/attach detection signal input terminal
I Remote control signal input from the remote control signal receiver
O SONY bus data output to bus interface (BT39UW/BT3900U: US and Canadian models)
I SONY bus data input from the bus interface (BT39UW/BT3900U: US and Canadian models)
SONY bus clock signal output to the bus interface
O
(BT39UW/BT3900U: US and Canadian models)
I External data bus width select signal input
I Flash write signal input terminal
I Low speed operation clock signal input terminal (32.768 kHz)
O Low speed operation clock signal output terminal (32.768 kHz)
I System reset signal input from the reset signal generator and reset switch
O High speed operation clock signal output terminal (7.92 MHz)
― Ground terminal
I High speed operation clock signal input terminal (7.92 MHz)
― Power supply terminal (+3.3V)
I Non-maskable interrupt signal input terminal
I Rotary remote commander shift key input terminal
I Back up power supply detection signal input terminal
O Reset signal output terminal
SONY bus on/off control signal output to the bus interface
O
(BT39UW/BT3900U: US and Canadian models)
I Serial data input from the CD section
O Not used
O Serial data output to the CD section
O Not used
O D/D converter frequency control signal output terminal
O Not used
O Beep sound drive signal output to the power amplifi er
O IIC serial clock signal output terminal
I/O IIC two-way serial data bus terminal
O Flash writer data output terminal
I Flash writer data input terminal
I Flash writer clock signal output terminal
O Flash writer busy signal output terminal
O Not used
I CD servo power supply control request signal input from the CD section
I CD mecha power supply control request signal input from the CD section
O Wakeup signal output to the CD section
I Muting on/off control signal input from the CD section
O EPM signal output terminal
I Model name select signal input terminal
O Chip enable signal output terminal
O Not used
I Spectrum analyzer serial data input from the CD section
O Spectrum analyzer serial clock signal output to the CD section
O Power on/off control signal output for the USB section
O Power on/off control signal output terminal for the USB section
I Over current detection signal input terminal for USB power supply section
O External muting on/off control signal output terminal
O Not used
I Telephone attenuator detection signal input terminal
I Accessory power detection signal input terminal
O Muting on/off control signal output terminal
MEX-BT39UW/BT3900U/BT3950U
Description
Fixed at "L" in this set
Connect to VSS in this set
Normally operation: "L", Flash write: "H"
Fixed at "H" in this set
"L" is input at low voltage
Fixed at "L" in this set
Fixed at "H" in this set
Not used
"L": accessory power on
"H": muting on
"L": reset
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