S912XHY128F0VLM Datasheet, PDF (96/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12XHYPIMV1)
1 _{Read: Anytime}
Write: Anytime
2.3.18 Port T Pull Device Enable Register (PERT)
Address 0x0244
R
W
Reset
7
PERT7
1
1 _{Read: Anytime}
Write: Anytime
6
PERT6
5
PERT5
4
PERT4
3
PERT3
2
PERT2
1
1
1
1
1
Figure 2-16. Port T Pull Device Enable Register (PERT)
Access: User read/write¹
1
0
PERT1
PERT0
1
1
Table 2-14. PERT Register Field Descriptions
Field
7-0
PERT
Description
Port T pull device enable—Enable pull device on input pin
This bit controls whether a pull device on the associated port input pin is active. If a pin is used as output this bit has
no effect. The polarity is selected by the related polarity select register bit.
1 Pull device enabled
0 Pull device disabled
2.3.19 Port T Polarity Select Register (PPST)
Address 0x0245
R
W
Reset
7
PPST7
1
1 _{Read: Anytime}
Write: Anytime
6
PPST6
5
PPST5
4
PPST4
3
PPST3
2
PPST2
1
1
1
1
1
Figure 2-17. Port T Polarity Select Register (PPST)
Access: User read/write¹
1
0
PPST1
PPST0
1
1
Table 2-15. PPST Register Field Descriptions
Field
7-0
PPST
Description
Port T pull device select—Configure pull device polarity on input pin
This bit selects a pull-up or a pull-down device if enabled on the associated port input pin.
1 A pull-down device is selected
0 A pull-up device is selected
MC9S12XHY-Family Reference Manual, Rev. 1.01
96
Freescale Semiconductor