EP80579 Datasheet, PDF (807/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
Table 22-3. Bus 0, Device 31, Function 0: Summary of General Purpose I/O Configuration
Registers Mapped Through GBA BAR IO BAR (Sheet 2 of 2)
Offset Start Offset End
Register ID - Description
Default
Value
30h
33h
“Offset 30h: GPIO_USE_SEL2 - GPIO Use Select 2 {63:32} Register” on page 813 Variable
34h
37h
“Offset 34h: GP_IO_SEL2 - GPIO Input/Output Select 2 {63:32} Register” on
page 813
00000300h
38h
3Bh
“Offset 38h: GP_LVL2 - GPIO Level for Input or Output 2 {63:32} Register” on
page 814
00030207h
22.2.1 Register Descriptions
Note:
For more information on the format of the register description tables that follow in this
chapter, see Section 7.1.1, “Register Description Tables” on page 183).
22.2.1.1 Offset 00h: GPIO_USE_SEL1 -GPIO Use Select 1 {31:0} Register
Table 22-4. Offset 00h: GPIO_USE_SEL1 - GPIO Use Select 1 {31:0} Register
Description: This register is used to select between GPIO and alternative functions on GPIO[31:0]
View: PCI
Size: 32 bit
BAR: GBA(IO)
Default: Variable
Bus:Device:Function: 0:31:0
Offset Start: 00h
Offset End: 03h
Power Well: Core^a
Bit Range Bit Acronym
Bit Description
Sticky
31 : 00
Enables GPIO[n] (where n is the bit number) to be used as a
GPIO, rather than for the alternative function.
1 = Signal used as GPIO (or unmuxed).
0 = Signal used as alternative function.
• Bit Access is always RO and returns 0 for bit[22] since there
is no GPIO pin[22].
GPIO_USE_SEL • Bit Access is always RO and returns 1 for bit[0:1, 6:10,
12:15] since there is no alternative function for GPIO
pins[0:1, 6:10, 12:15].
• Bit Reset Value is 0000_F7C3h when SIU2_TXD is strapped
low on the rising edge of PWROK, else DBBFF7C3h.
• See Section 22.1, “Overview” on page 803 for more details.
• See Table 22-1 for list of alternate functions.
a. Core for 0:7, 16:21, 23; Resume for 8:15, 24:31.
Bit Reset
Value
Variable
Bit Access
RW
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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