XIO3130
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SLLS693F–MAY 2007–REVISED JANUARY 2010
Table 4-36. Bit Descriptions – GPIO B Control Register
BIT
FIELD NAME
ACCESS
DESCRIPTION
15
RSVD
r
Reserved, reads back zero
GPIO 9 Control. This field controls the GPIO9 pin as follows:
000 – General Purpose Input (default)
001 – General Purpose Output
010 – Port 1 EMIL_CTL0
011 – Port 2 EMIL_CTL2
100 – Port 1 ATN_LED0
101 – Port 2 ATN_LED1
14:12
PCIE_GPIO9_CTL
rw
110 – Port 1 PWR_LED0
111 – Port 2 PWR_LED1
See GPIO Data register for a detailed description of this field.
This field is loaded from EEPROM (if present), and reset with FRST.
If the DN3_DPSTRP terminal is pulled high at the de-assertion of reset, the GPIO9 terminal
is directly mapped as the PWR_ON PCI Hot Plug terminal for port 3 and is no longer
available for use as a GPIO. In this situation these bits have no meaning and should be left
at their default value.
GPIO 8 Control. This field controls the GPIO8 pin as follows:
000 – General Purpose Input (default)
001 – General Purpose Output
010 – Port 1 ACT_BTN0
011 – Port 2 ACT_BTN1
100 – Port 1 PWRFLT0
101 – Port 2 PWRFLT1
11:9
PCIE_GPIO8_CTL
rw
110 – Port 1 EMIL_ENG0
111 – Port 2 EMIL_ENG1
See GPIO Data register for a detailed description of this field.
This field is loaded from EEPROM (if present), and reset with FRST.
If the DN3_DPSTRP terminal is pulled high at the de-assertion of reset, the GPIO8 terminal
is directly mapped as the PRESENT PCI Hot Plug terminal for port 3 and is no longer
available for use as a GPIO. In this situation these bits have no meaning and should be left
at their default value.
GPIO 7 Control. This field controls the GPIO7 pin as follows:
000 – General Purpose Input (default)
001 – General Purpose Output
010 – Port 2 CLKREQ1
011 – Port 2 MRLS_DET1
100 – Port 1 PWRFLT0
8:6
PCIE_GPIO7_CTL
rw
101 – Port 3 PWRFLT2
110 – Port 1 MRLS_DET0
111 – Port 3 MRLS_DET2,
See GPIO Data register for a detailed description of this field.
This field is loaded from EEPROM (if present), and reset with FRST.
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XIO3130 Configuration Register Space
67
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