Datasheet

5−5
5.5 GPIO Output Data Register
The GPIO output data register controls the data driven on the GPIO terminals configured as outputs. If both an
output-high bit and an output-low bit are set for the same GPIO terminal, the output-low bit takes precedence. The
output data bits have no effect on a GPIO terminal that is programmed as an input.
Bit 7 6 5 4 3 2 1 0
Name GPIO output data
Type R/W R/W R/W R/W R/W R/W R/W R/W
Default 0 0 0 0 0 0 0 0
Register: GPIO output data
Type: Read/Write
Offset: 65h
Default: 00h
Table 5−5. GPIO Output Data Register Description
BIT TYPE FUNCTION
7 R/W GPIO3 output high. Writing a 1 to this bit causes the GPIO signal to be driven high. Writing a 0 has no effect.
6 R/W GPIO2 output high. Writing a 1 to this bit causes the GPIO signal to be driven high. Writing a 0 has no effect.
5 R/W GPIO1 output high. Writing a 1 to this bit causes the GPIO signal to be driven high. Writing a 0 has no effect.
4 R/W GPIO0 output high. Writing a 1 to this bit causes the GPIO signal to be driven high. Writing a 0 has no effect.
3 R/W GPIO3 output low. Writing a 1 to this bit causes the GPIO signal to be driven low. Writing a 0 has no effect.
2 R/W GPIO2 output low. Writing a 1 to this bit causes the GPIO signal to be driven low. Writing a 0 has no effect.
1 R/W GPIO1 output low. Writing a 1 to this bit causes the GPIO signal to be driven low. Writing a 0 has no effect.
0 R/W GPIO0 output low. Writing a 1 to this bit causes the GPIO signal to be driven low. Writing a 0 has no effect.
5.6 GPIO Output Enable Register
The GPIO output enable register controls the direction of the GPIO signal. By default all GPIO terminals are inputs.
If both an output-enable bit and an input-enable bit are set for the same GPIO terminal, the input-enable bit takes
precedence.
Bit 7 6 5 4 3 2 1 0
Name GPIO output enable
Type R/W R/W R/W R/W R/W R/W R/W R/W
Default 0 0 0 0 0 0 0 0
Register: GPIO output enable
Type: Read/Write
Offset: 66h
Default: 00h
Table 5−6. GPIO Output Enable Register Description
BIT TYPE FUNCTION
7 R/W GPIO3 output enable. Writing a 1 to this bit causes the GPIO signal to be configured as an output. Writing a 0 has no effect.
6 R/W GPIO2 output enable. Writing a 1 to this bit causes the GPIO signal to be configured as an output. Writing a 0 has no effect.
5 R/W GPIO1 output enable. Writing a 1 to this bit causes the GPIO signal to be configured as an output. Writing a 0 has no effect.
4 R/W GPIO0 output enable. Writing a 1 to this bit causes the GPIO signal to be configured as an output. Writing a 0 has no effect.
3 R/W GPIO3 input enable. Writing a 1 to this bit causes the GPIO signal to be configured as an input. Writing a 0 has no effect.
2 R/W GPIO2 input enable. Writing a 1 to this bit causes the GPIO signal to be configured as an input. Writing a 0 has no effect.
1 R/W GPIO1 input enable. Writing a 1 to this bit causes the GPIO signal to be configured as an input. Writing a 0 has no effect.
0 R/W GPIO0 input enable. Writing a 1 to this bit causes the GPIO signal to be configured as an input. Writing a 0 has no effect.