MC9S12E128CFUE Datasheet, PDF (158/606 Pages) Freescale Semiconductor, Inc – MC9S12E128 Data Sheet

Chapter 3 Port Integration Module (PIM9E128V1)
3.3.7.6 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 3-47. 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 3-34. PPST Field Descriptions
Field
Description
7:0
Pull Select Port U
PPSU[7:0] 0 A pull-up device is connected to the associated port T pin.
1 A pull-down device is connected to the associated port T pin.
3.3.7.7 Port U Module Routing Register (MODRR)
7
R
0
W
Reset
0
6
5
4
3
2
1
0
0
0
MODRR3 MODRR2 MODRR1
0
0
0
0
0
0
Figure 3-48. Port U Module Routing Register (MODRR)
Read: Anytime. Write: Anytime.
This register selects the module connected to port U.
Table 3-35. MODRR Field Descriptions
Field
Description
3:0
Pull Select Port U
MODRR[3:0] 0 If enabled, TIM2 channel is connected to the associated port U pin.
1 If enabled, PWM channel is connected to the associated port U pin.
0
MODRR0
0
MC9S12E128 Data Sheet, Rev. 1.07
158
Freescale Semiconductor