Datasheet

Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual Rev. 1.25
124 Freescale Semiconductor
2.3.26 Port T Polarity Select Register (PPST)
2.3.27 PIM Reserved Register
2.3.28 PIM Reserved Register
Address 0x0245 Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
76543210
R
PPST7 PPST6 PPST5 PPST4 PPST3 PPST2 PPST1 PPST0
W
Reset 00000000
Figure 2-24. Port T Polarity Select Register (PPST)
Table 2-25. PPST Register Field Descriptions
Field Description
7-0
PPST
Port T pull device select—Determine pull device polarity on input pins
This register selects whether a pull-down or a pull-up device is connected to the pin.
1 A pull-down device is connected to the associated pin, if enabled and if the pin is used as input.
0 A pull-up device is connected to the associated pin, if enabled and if the pin is used as input.
Address 0x0246 Access: User read
(1)
1. Read: Always reads 0x00
Write: Unimplemented
76543210
R00000000
W
Reset 00000000
= Unimplemented or Reserved
Figure 2-25. PIM Reserved Register
Address 0x0247 Access: User read
(1)
1. Read: Always reads 0x00
Write: Unimplemented
76543210
R00000000
W
Reset 00000000
= Unimplemented or Reserved
Figure 2-26. PIM Reserved Register