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 Amplifi er muting on/off control signal output to the power amplifi er “L”: muting on
58 AMPSTBY O Standby signal output to the power amplifi 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
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