Pin # Signal Description | Ampro Corporation XTX 820 instruction

Chapter 3			Hardware
Table 3-7. Simplified Audio Interface Pin/Signal Descriptions (J1)

	J1 Pin #	Signal	Description
	38	AUXAL	Auxiliary A input Left – This signal is normally used for an external CD-ROM
			analog output or similar live-level audio source. Minimum input impedance is
			5k Ohms and nominal input level is 1 volt RMS.
	40	MIC	Microphone reference signal – This microphone input signal has a minimum
			input impedance of 5k Ohms, and the maximum input voltage is 0.15 Vp-p.
	42	AUXAR	Auxiliary A input Right – This signal is normally used for an external CD-ROM
			analog output or similar live-level audio source. Minimum input impedance is
			5k Ohms and nominal input level is 1 volt RMS.
	44	ASVCC	Analog Supply Voltage – This test voltage is used for the sound controller, but
			is not available for customer use.
	46	SNDL	Stereo Line Output Left channel – This output signal has a nominal level of 1
			volt RMS into 10k impedance load. This output signal can not drive low-
			impedance speakers directly.
	48	ASGND	Analog Ground – This ground is used for the sound controller and an external
			amplifier to achieved the lowest audio noise levels.
	50	SNDR	Stereo Line Output Right channel – This output signal has a nominal level of 1
			volt RMS into 10k impedance load. This output signal can not drive low-
			impedance speakers directly

Note: The shaded area denotes power or ground.

Table 3-8. Complete J1 Interface Pin/Signal Descriptions (J1)

Pin #	Signal	Description
1	GND	Ground

2	GND	Ground
3	PCICLK3	PCI clock 3 – This signal line is one of four signal lines. These clock signals
		provide the timing outputs for four external PCI devices and the timing for
		all transactions on the PCI bus.
4	PCICLK4	PCI clock 4 – Refer to pin-3 for more information.

5	GND	Ground
6	GND	Ground
7	PCICLK1	PCI clock 1 – Refer to pin-3 for more information.

8	PCICLK2	PCI clock 2 – Refer to pin-3 for more information.

9	REQ3*	Bus Request 3 – This signal line is one of four signal lines. These signals
		indicate to the arbitrator that the device desires use of the bus.
10	GNT3*	Grant 3 – This signal line is one of four signal lines. These signal lines
		indicate access has been granted to the requesting device (PCI Masters).
11	GNT2*	Grant 3 – Refer to pin 10 for more information.

12	+3.3V	+3.3 volts +/-%5
13	REQ2*	Bus Request 0 – This signal line is one of three signal lines. These signals
		indicate the device desires use of the bus to the arbitrator.
14	GNT1*	Grant 1 – Refer to pin 10 for more information.

15	REQ1*	Bus Request 1 – Refer to pin 9 for more information.
16	+3.3V	+3.3 volts +/-%5

XTX 820

Reference Manual

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