Table 7−23. GPIO Control Register Description (Continued)

BIT

SIGNAL

TYPE

 

FUNCTION

 

 

 

 

 

 

 

GPIO1 enable control. When bit 15 (DISABLE_LPS) is set to 1, this bit controls the output enable for

12

GPIO_ENB1

R/W

GPIO1.

0

= High-impedance output (default)

 

 

 

 

 

 

1

= Output is enabled

 

 

 

 

11−9

RSVD

R

Reserved. Bits 11−9 return 0s when read.

 

 

 

 

8

GPIO_DATA1

R/W

GPIO1 data. When bit 15 (DISABLE_LPS) is set to 1 and GPIO1 output is enabled, the value written to

this bit represents the logical data driven to the GPIO1 terminal.

 

 

 

 

 

 

 

 

 

 

Disable bus manager contender (BMC). This bit configures this terminal as bus manager contender or

7

DISABLE_BMC

R/W

GPIO0.

0

= BMC (default)

 

 

 

 

 

 

1

= GPIO0

 

 

 

 

6

RSVD

R

Reserved. Bit 6 returns 0 when read.

 

 

 

 

 

 

 

GPIO0 polarity invert. When bit 7 (DISABLE_BMC) is set to 1, this bit controls the input/output polarity

5

GPIO_INV0

R/W

control for GPIO0.

0

= Noninverted (default)

 

 

 

 

 

 

1

= Inverted

 

 

 

 

 

 

 

GPIO0 enable control. When bit 7 (DISABLE_BMC) is set to 1, this bit controls the output enable for

4

GPIO_ENB0

R/W

GPIO0.

0

= High-impedance output (default)

 

 

 

 

 

 

1

= Output is enabled

 

 

 

 

3−1

RSVD

R

Reserved. Bits 3−1 return 0s when read.

 

 

 

 

0

GPIO_DATA0

R/W

GPIO0 data. When bit 7 (DISABLE_BMC) is set to 1 and GPIO0 output is enabled, the value written to

this bit represents the logical data driven to the GPIO0 terminal.

 

 

 

 

 

 

 

 

7−20

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Image 180
Texas Instruments PCI7411 manual GPIOENB1 GPIO1, GPIODATA1, Disablebmc GPIO0, = GPIO0, GPIOINV0, GPIOENB0 GPIO0, GPIODATA0