MC3S12RG128 Datasheet, PDF (83/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 2 Port Integration Module (PIM3RG128V1) Block Description
2.3.2.1.6 Port T Polarity Select Register (PPST)
Module Base + 0x_0005
R
W
Reset
7
PPST7
0
6
PPST6
5
PPST5
4
PPST4
3
PPST3
2
PPST2
0
0
0
0
0
Figure 2-8. Port T Polarity Select Register (PPST)
1
PPST1
0
Read: Anytime.
Write: Anytime.
This register selects whether a pull-down or a pull-up device is connected to the pin.
Table 2-6. PPST Field Descriptions
0
PPST0
0
Field
Description
7–0
PPST[7:0]
Pull Select Port T Bits
0 A pull-up device is connected to the associated port T pin, if enabled by the associated bit in register PERT
and if the port is used as input.
1 A pull-down device is connected to the associated port T pin, if enabled by the associated bit in register PERT
and if the port is used as input.
MC3S12RG128 Data Sheet, Rev. 1.05
Freescale Semiconductor
83