CDX-G1200U/G1201U/G1202U/G1280UM
26
• IC Pin Function Description
MAIN BOARD IC501 LC88FC2H0AF2327-ENG (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1 to 3
NC
O
Not used
4
FLASH_RW
I/O
Debug communication terminal Not used
5
RESET
I
System reset signal input terminal “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it change to “H”
6
SUB_X1
I
Low-speed clock input terminal (32.768 kHz)
7
SUB_X2
O
Low-speed clock output terminal (32.768 kHz)
8
VSS1
-
Ground terminal
9
MAIN_X1
I
High-speed clock input terminal (9.25 MHz)
10
MAIN_X2
O
High-speed clock output terminal (9.25 MHz)
11
VDD1
-
Power supply terminal (+3.3V)
12 to 16
NC
O
Debug test terminal Not used
17
EN_SYS
O
Power on/off control signal output to the DC/DC converter “H”: power on
18
FLT_USB
I
USB power fault status signal input from the VBUS switch “L”: power fault
19
XM_PWR
O
SIRIUSXM power supply on/off control signal output terminal Not used
20
SDO
O
Serial data output to the audio DSP
21
SDI
I
Serial data input from the audio DSP
22
SCK
O
Serial data transfer clock signal output to the audio DSP
23, 24
NC
O
Not used
25
SYNC
O
Frequency control signal output to the DC/DC converter
26
XM_RX
I
Serial data input terminal Not used
27
XM_TX
O
Serial data output terminal Not used
28
REG_SDA
I/O
Two-way data bus with the regulator
29, 30
PD1, PD2
O
Not used
31
REG_SCL
O
Serial data transfer clock signal output to the regulator
32, 33
NC
-
Not used
34
BUSY
I
Busy signal input from the audio DSP “L”: busy
35
BU_IN
I
Back-up power detection signal input from the regulator
36
VSS2
-
Ground terminal
37
VDD2
-
Power supply terminal (+3.3V)
38
TU_SCL
O
Serial data transfer clock signal output to the FM/AM receiver
39
TU_SDA
I/O
Two-way serial data bus with the FM/AM receiver
40
NC
O
Not used
41
CMD_ERR
I
Command error signal input from the audio DSP “H”: error
42
CE
O
Chip enable signal output to the audio DSP
43
SYSRST
O
Reset signal output to the audio DSP “L”: reset
44
USB_IN
I
USB device detection signal input from the audio DSP “L”: USB device is connected
45
SMONI
I
Watch-dog timer status monitor input from the audio DSP
46
LCD_CLK
O
Serial data transfer clock signal output to the front panel block
47
LCD_CE
O
Chip enable signal output to the front panel block
48
LCD_DATA
O
Serial data output to the front panel block
49, 50
NC
O
Not used
51
ACC_IN
I
Accessory power detection signal input from the regulator “L”: accessory power on
52
VDD3
-
Power supply terminal (+3.3V)
53
VSS3
-
Ground terminal
54
NC
O
Not used
55
ILL_IN
I
Not used
56
ATT
O
Audio muting on/off control signal output terminal “H”: muting on
57
AMP_MUTE
O
Ampli
fi
er muting on/off control signal output to the power ampli
fi
er “L”: muting on
58
AMPSTBY
O
Standby signal output to the power ampli
fi
er “L”: standby
59
SEL_XM
O
SIRIUSXM mode selection signal output terminal Not used
60
SEL_AUX
O
AUX mode selection signal output terminal Not used
61
OFFSET_DET (NC)
O
Not used
62
KEY_ACK0
I
Key acknowledge signal (wake up signal) input from the rotary commander
63
KEY_ACK1
I
Key acknowledge signal (wake up signal) input from the front panel block
64
SIRCS
I
Remote control signal input from the front panel block
65
NC
O
Not used
