Digital I/O Registers
427
SLAU208Q – June 2008 – Revised March 2018
Copyright © 2008–2018, Texas Instruments Incorporated
Digital I/O Module
12.4.12 PxREN Register
Port x Pullup/Pulldown Resistor Enable Register
Figure 12-12. PxREN Register
7
6
5
4
3
2
1
0
PxREN
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
Table 12-14. PxREN Register Description
Bit
Field
Type
Reset
Description
7-0
PxREN
RW
0h
Port x pullup or pulldown resistor enable. When respective port is configured as
input, setting this bit will enable the pullup or pulldown. See
0b = Pullup or pulldown disabled
1b = Pullup or pulldown enabled
12.4.13 PxDS Register
Port x Drive Strength Register
Figure 12-13. PxDS Register
7
6
5
4
3
2
1
0
PxDS
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
Table 12-15. PxDS Register Description
Bit
Field
Type
Reset
Description
7-0
PxDS
RW
0h
Port x drive strength
0b = Reduced output drive strength
1b = Full output drive strength
12.4.14 PxSEL Register
Port x Port Select Register
Figure 12-14. PxSEL Register
7
6
5
4
3
2
1
0
PxSEL
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
rw-0
Table 12-16. PxSEL Register Description
Bit
Field
Type
Reset
Description
7-0
PxSEL
RW
0h
Port x function selection
0b = I/O function is selected
1b = Peripheral module function is selected