Sony CDX-GT55UIW Service Manual page 26

CDX-GT55UIW/GT550UI/GT600UI
• IC Pin Function Description
MAIN BOARD (2/3) IC501 R5F3650KBDZ99FA (SYSTEM CONTROL)
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
42 MODELNAME_SEL0
43 MODELNAME_SEL1
44 MODELNAME_SEL2
45 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
26
I/O
O Serial data output for LCD driver
O Serial clock signal output for LCD driver
I Front panel detach detect signal input (Fixed at L in this set)
I SIRCS signal input
O SONY BUS serial data output (US, Canadian model)
I SONY BUS serial data input (US, Canadian model)
O SONY BUS serial clock signal output (US, Canadian model)
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
I High speed operation clock signal input (7.92 MHz)
― Power supply pin (+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 System reset signal output
O VBUS power control signal output (US, Canadian model)
I MC-BUS communication MECHA (CMX-101Z) TX signal input
O Not used. (Open)
O MC-BUS communication MECHA (CMX-101Z) RX signal output
O Not used. (Open)
O DD converter frequency control signal output
O Not used. (Open)
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 writer IF (serial data) output
I Flash writer IF (serial data) input
I Flash writer IF (serial clock) signal input
O Flash writer IF (busy) signal output
O Not used. (Open)
I CD mechanism servo power supply control request signal input
I CD mechanism deck power supply control request signal input
O CD mechanism deck micon wake up signal output
I Z mute signal input
O EPM signal output (Fixed at L in this set)
I Model name select signal input 0 (Fixed at L in this set)
I Model name select signal input 1 (Fixed at L in this set)
I Model name select signal input 2
I Model name select signal input 3
O CE signal output (Fixed at H in this set)
O Not used. (Open)
I Paradisso spectrum analyzer serial data input
O Paradisso spectrum analyzer serial clock signal output
O USB over current detect IC control signal output
I VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)
I USB over current detect signal input
L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the
O
status of other source) (Not used in this set)
O Not used. (Open)
I Telephone attenuator detect signal input (Fixed at L in this set)
I Accessory power supply detect signal input
O Audio mute control signal output
Description