Datasheet

Chapter 3 Port Integration Module (PIM9E128V1)
MC9S12E128 Data Sheet, Rev. 1.07
158 Freescale Semiconductor
3.3.7.6 Port U Polarity Select Register (PPSU)
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.
3.3.7.7 Port U Module Routing Register (MODRR)
Read: Anytime. Write: Anytime.
This register selects the module connected to port U.
76543210
R
PPSU7 PPSU6 PPSU5 PPSU4 PPSU3 PPSU2 PPSU1 PPSU0
W
Reset 0 0 0 00000
Figure 3-47. Port U Polarity Select Register (PPSU)
Table 3-34. PPST Field Descriptions
Field Description
7:0
PPSU[7:0]
Pull Select Port U
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.
76543210
R0000
MODRR3 MODRR2 MODRR1 MODRR0
W
Reset 0 0 0 00000
Figure 3-48. Port U Module Routing Register (MODRR)
Table 3-35. MODRR Field Descriptions
Field Description
3:0
MODRR[3:0]
Pull Select Port U
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.