Intel 31244 PCI-X manual Terminations Pull-up/Pull-down Sheet 2

Intel® 31244 PCI-X to Serial ATA Controller

Terminations: Pull-down/Pull-ups

Table 30.	Terminations: Pull-up/Pull-down (Sheet 2 of 2)
	Signal Name	Pull-up or Pull-down	Comments
	TEST0	Connect to GND
	TOUT	NC
			Controls status bit 16, in the PCI-X Status Register. When
	32BITPCI#	1K pull-up for 64 bit	pulled down, reports a 0, for a 32-bit bus. When pulled up,
			reports 1, a 64-bit device.
	DPA_MODE#	GND to enable DPA	1K pull-up to enable legacy mode.
		Mode
	SSCEN	Connect to GND
	TX0P, TX0N, TX1P,
	TX1N,TX2P,TX2N	series 0.01uF capacitor
	RX0P, RX0N, RX1P,
	RX1N,RX2P,RX2N
	TRST#, TDI#, TMS#,	4.7K pull-up
	TCK
	P_SERR#	10 K pull-up2
	P_TRDY#	10 K pull-up2
	P_LOCK#	10 K pull-up2
	P_PERR#	10 K pull-up2
	P_DEVSEL#	10 K pull-up2
	P_FRAME#	10 K pull-up2
	P_STOP#	10 K pull-up2
	P_IRDY#	10 K pull-up2
	P_INTA#	10 K pull-up2
	P_INTB#	10 K pull-up2
	P_INTC#	10 K pull-up2
	P_INTD#	10 K pull-up2
	P_AD[63:32]	10 K pull-up2
	P_C/BE[7:4]#	10 K pull-up2
	P_PAR64	10 K pull-up2
	P_REQ64#	10 K pull-up2
	P_ACK64#	10 K pull-up2

NOTES:

1.Pull-up only when PCI bus is to operate at 66 MHz and not already pulled up by system board. This signal is grounded for 33 MHz operation. It is advisable to connect M66EN to a 0.01 µF capacitor located with-in 0.25 inches of the M66EN pin on a add-in connector.

2.Pull-up only when not already pulled up on PCI bus. An add-in card may rely on the motherboard to pull-up these values.

3.PCI/XCAP - The maximum trace length between the resistor (when installed), capacitor, and the connector contact is 0.25 inches. The maximum trace length between the resistor (when installed), capacitor, and ground is 0.1 inches. A PCI-X card is not permitted to connect PCI/XCAP to anything else including supply voltages and device input and output pins.

66 Design Guide