Ampro Corporation Littleboard 550 Susc, Pwrbt, Batlow, Mdata, Mclk, Smbclk, Smbdata, USB1PWR

Chapter 3				Hardware
Table 3-18. Utility 2 Interface Pin/Signal Descriptions (J24)
	Pin #	Signal	I/O	Description
	1	SUSC*	-	Lid Switch
	2	PWRBT*	I	Power Button
	3	BATLOW*	I-	Low Battery
	4	NC	O	Not Connected (IR Mode Select)
	5	Reserved	O	Reserved (IrDA Transmit)
	6	Reserved	I	Reserved (IrDA Receive)
	7	GND	-	Ground
	8	VCC	-	+5 volts
	9	MDATA	I/O	Mouse Data
	10	MCLK	I/O	Mouse Clock
	11	GND	-	Ground
	12	VCC	-	+5 volts
	13	SMBCLK	-	SMBus Clock
	14	SMBDATA	-	SMBus Data
	15	USB1PWR	-	+5V USB 1 Port Power – Port is disabled if this input is low.
	16	USB2PWR	-	+5V USB 2 Port Power – Port is disabled if this input is low.
	17	USBP1-	I/O	Universal Serial Bus Port 1 Data Negative
	18	USBP2-	I/O	Universal Serial Bus Port 2 Data Negative
	19	USBP1+	I/O	Universal Serial Bus Port 1 Data Positive
	20	USBP2+	I/O	Universal Serial Bus Port 2 Data Positive
	21	USB1GND	-	USB 1 Port ground
	22	USB2GND	-	USB 2 Port ground
	23	SHIELD1	-	USB 1 Port shield (Cable Shield)
	24	SHIELD2	-	USB 2 Port shield (Cable Shield)

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

50 Reference Manual LittleBoard 550