MC9S12HZ256 Datasheet, PDF (155/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

4.3.7.6
Chapter 4 Port Integration Module (PIM9HZ256V2)
Port U Polarity Select Register (PPSU)
R
W
Reset
7
PPSU7
0
6
PPSU6
5
PPSU5
4
PPSU4
3
PPSU3
2
PPSU2
0
0
0
0
0
Figure 4-48. Port U Polarity Select Register (PPSU)
1
PPSU1
0
0
PPSU0
0
Read: Anytime. Write: Anytime.
The Port U Polarity Select Register selects whether a pull-down or a pull-up device is connected to the pin.
The Port U Polarity Select Register is effective only when the corresponding Data Direction Register bit
is set to 0 (input) and the corresponding Pull Device Enable Register bit is set to 1.
Table 4-35. PPSU Field Descriptions
Field
Description
7:0
Pull Select Port U
PPSU[7:0] 0 A pull-up device is connected to the associated port U pin.
1 A pull-down device is connected to the associated port U pin.
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
155