Intel IQ80321 manual Switch S8E1 7 Descriptions, Switch S8E1 7 Settings and Operation Mode

Intel® IQ80321 I/O Processor Evaluation Platform

Hardware Reference Section

3.10.9.10Switch S8E1- 7

Used to enable the IDSEL reroute function at reset or power-up. The reset value of the secondary bus private device mask register is modified according to the tie value of the IDSEL_REROUTE_EN pin.

0 = on: reset value of the secondary bus private device mask register is x’00000000’.

1 = off: reset value of the secondary bus private device mask register is x’22F20000’.

Table 58.	Switch S8E1 - 7: Descriptions
	Switch	Association	Description	Factory Default
	S8E1-7	PCI-X Bridge	IDSEL_REROUTE_EN: Sets the value of SPCI-X	Off
			private device mask.

Table 59.	Switch S8E1 - 7: Settings and Operation Mode
	S8E1-7	Operation Mode
	Off	PCI-X Bridge hides the devices that using private space address lines.
	On	PCI-X Bridge does not hide any devices.

3.10.9.11Switch S8E1- 8

Used to enable the opaque memory region at reset or power-up. The reset value of bit 0 of the opaque memory enable register is modified according to the tie value of the OPAQUE_EN pin.

0 = on: reset value of bit 0 of the opaque memory enable register is b’0’.

1 = off: reset value of bit 0 of the opaque memory enable register is b’1’.

This register enables the opaque memory base, opaque memory limit, opaque memory base upper

32 bits, and the opaque memory limit upper 32 bits registers. These registers specify a range of 64-bit memory addresses that are used exclusively on the secondary PCI bus and are not to be accepted by the bridge on either the primary or secondary interfaces.

Table 60.	Switch S8E1 - 8: Descriptions
	Switch	Association	Description	Factory Default
	S8E1-8	PCI-X Bridge	OPAQUE-EN: controls OPAQUE memory register.	Off
Table 61.	Switch S8E1 - 8: Settings and Operation Mode
	S8E1-1		Operation Mode
	Off	Enables opaque.
	On	No opaque.

62 Board Manual