GPIO Map

This map details the usage of each GPIO pin on the 5536. (Last updated January 09, 2007 for B1):

PIN	Usage	Input	Output	Notes	OUTPUT_ENABLE	OUT_AUX1	OUT_AUX2	INPUT_ENABLE	IN_AUX1	INPUT_EVENT_ENABLE
1	AC_BEEP		X	Connected to PCSPK	X	X
2	GPIO2	X		Reads memory strap				X
3	VGA SCL	-	-	EDID line - not needed for XO machine
4	VGA SDA	-	-	EDID line - not needed for XO machine
5	DCONSTAT0	X		DCON status pin (1 of 2)				X
6	DCONSTAT1	X		DCON status pin (2 of 2)				X
7	DCONIRQ	X		DCON Interrupt PIN				X		X
8	UART1_TX		X	UART Transmit	X	X
9	UART1_RX		X	UART Receive				X	X
10	UNUSED	-	-	Goes to test point
11	DCONLOAD		X	Output indicator for DCON	X
12	DCONBLNK		X	DCON Signal	X
13	SMI#		X	SMI# pin to the GX	X
14	SMB_CLK	-	-	SMBus clock		X		X	X
15	SMB_DATA	-	-	SMBus data		X		X	X
16	LPC_AD0	-	-	Defaults to LPC - no GPIO control
17	LPC_AD1	-	-	Defaults to LPC - no GPIO control
18	LPC_AD2	-	-	Defaults to LPC - no GPIO control
19	LPC_AD3	-	-	Defaults to LPC - no GPIO control
20	LPC_DRQ_L	-	-	Defaults to LPC - no GPIO control
21	LPC_SERIRQ	-	-	Defaults to LPC - no GPIO control
22	LPC_FRAME_L	-	-	Defaults to LPC - no GPIO control
24	WORK_AUX		X	Xontrols MAIN_ON (which controls VCORE_CPU)	X	X
25	-	-	-	Unknown - line is SWI# goes into GPIO2 on the EC
26	UNUSED	-	-	Goes to test point
27	-	-	-	Unknown - line is SCI# goes into GPIO5/SCI# on the EC
28	PWR_BUT#	X		Power button input				X	X