Ampro Corporation XTX 820 manual Matrix Component Address Binary

Chapter 3					Hardware
Table 3-27. SMBus Reserved Addresses
	Matrix Component			Address Binary
	Memory & Graphics Hub (82915GM)			1010,010xb
	DDR2 RAM EPROM			1010,000xb
	Clock Generator (UICS954201)			1101,001xb
	I/O Hub (82801FBM)			0000,000xb (default) Programmable
Table 3-28. Complete J4 Interface Pin/Signal Descriptions (J4)
	Pin #	Signal	Description
	1	GND1	Ground
	2	GND3	Ground
	3	5V_SB	5 volt Suspend – This control signal is sent to the ATX power supply for a
			suspended or standby state.
	4	PWGIN	Power Good In – This active high input signal indicates to the XTX 820,
			the power is good and it can begin the boot process.
	5	PS_ON	Power Supply On – This active-low output signal from the XTX 820 is sent
			to the ATX power supply from the to turn it on.
	6	SPEAKER	Speaker – This PC speaker output signal must be connected to a speaker
			(piezoelectric or dynamic) on the baseboard to hear the output (beeps).
	7	PWRBTN*	Power Button – This signal provides a ground temporarily through an open
			collector driver to the ATX power supply to change states (turn it on).
	8	BATT	Battery Voltage – This is the + battery connection to the baseboard for +3
			volt lithium backup battery used to power RTC operation and CMOS
			non-volatile memory.
	9	KBINH	Keyboard Inhibit – This pin disables data input from the keyboard when
			asserted.
	10	LILED	Link Integrity LED – The LINK LED pin indicates link integrity. If the
			link is valid in either 10 or 100 Mbps, the LED is on; if the link is invalid,
			the LED is off.
	11	RSMRST*	Resume Reset – This signal is driven low by external circuitry to reset the
			power management logic on the XTX 820.
	12	ACTLED	Activity LED – The Activity LED pin indicates either transmit or receive
			activity. When activity is present, the activity LED is on; when no activity
			is present, the activity LED is off.
	13	NC	Not Connected (ROMKBCS*)
	14	SPDLED	Speed LED – The speed LED pin indicates the speed. The speed LED will
			be on at 100 Mbps and off at 10 Mbps.
	15	EXT_PRG	External Programming – This pin is used when handling external flash
			programming.
	16	I2CLK	I2C Clock – This clock line supports the I2C bus.
	17	VCC1	+5 volts +/-5%
	18	VCC3	+5 volts +/-5%
	19	OVCR*	Over Current Detect – This signal indicates a USB over-current condition.
	20	NC	Not Connected (GPCS*)
	21	EXTSMI*	Extern System Management Interrupt – This signal is provided by external
			circuitry to initiate an SMI event with the XTX 820.

XTX 820 Reference Manual 51