Intel IQ80321 manual Jumper J9E1, Jumper J9F1

Intel® IQ80321 I/O Processor Evaluation Platform

Hardware Reference Section

3.10.9.22Jumper J9E1

Base Address Register Enable:

Used to enable the base address register at reset or power-up. The 64-bit register located at offsets x'10' and x'14' is used to claim a 1 MB memory region when enabled. The register returns all zeroes to read accesses and the associated memory region is not claimed when disabled.

0 = (1-2): BAR disabled, register reads returns 0s, no memory region claimed.

1 = (2-3): BAR enabled, bits 63:20 can be written by software to claim a 1 MB memory region.

Table 82.	Jumper J9E1: Descriptions
	Jumper	Association	Description	Factory Default
	J9E1	PCI-X Bridge	BAR_EN: Enables Base Address Register (BAR)	2-3
Table 83.	Jumper J9E1: Settings and Operation Mode
	J9E1		Operation Mode
	Pins 1,2	Pulled up. BAR disabled, register reads return 0s, no memory region claimed.
	Pins 2,3	Pulled down. BAR enabled, bits 63:20 can be written by software to claim a 1 MB memory
		region.

3.10.9.23Jumper J9F1

Primary Configuration Busy:

Controls the reset and power up value of bit 2 of the miscellaneous control register. Used to sequence initialization with regard to the primary and secondary buses for applications that require access to the bridge configuration registers from the secondary bus. When pulled high, the configuration commands received on the primary bus are retried until such time as bit 2 of the miscellaneous control register is set to b‘0’ by a configuration write initiated from the secondary bus. Applications that do not require access to the bridge configuration registers from the secondary bus pull this signal to ground.

0 = (2-3): Reset value of bit 2 of the miscellaneous control register is b‘0’.

1 = (1-2): Reset value of bit 2 of the miscellaneous control register is b‘1’.

Table 84.	Jumper J9F1: Descriptions
	Jumper	Association	Description	Factory Default
	J9F1	PCI-X Bridge	P_CFG_BUSY: Allows user to control initialization	2-3
			sequence on the bridge.

Table 85.	Jumper J9F1: Settings and Operation Mode
	J9F1	Operation Mode
	Pins 1,2	Pulled up. Reset value of bit 2 of the miscellaneous control register to b’0’.
	Pins 2,3	Pulled down. Reset value of bit 2 of the miscellaneous control register to b’1’.

Board Manual 67