MC9S12P128 Datasheet, PDF (100/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12PPIMV1)
2.3.64 Port AD Pull Up Enable Register (PER1AD)
Address 0x0277
7
R
PER1AD7
W
Reset
0
1. Read: Anytime
Write: Anytime
6
5
4
3
2
PER1AD6 PER1AD5 PER1AD4 PER1AD3 PER1AD2
0
0
0
0
0
Figure 2-62. Port AD Pull Up Enable Register (PER1AD)
Access: User read/write⁽¹⁾
1
0
PER1AD1 PER1AD0
0
0
Table 2-58. PER1AD Register Field Descriptions
Field
Description
7-0 Port AD pull-up enable—Enable pull-up device on input pin
PER1AD 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.
1 Pull device enabled
0 Pull device disabled
2.3.65 PIM Reserved Registers
Address 0x0278-0x27F
7
6
5
4
3
2
R
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
= Unimplemented or Reserved
u = Unaffected by reset
1. Read: Always reads 0x00
Write: Unimplemented
Figure 2-63. PIM Reserved Registers
2.4 Functional Description
Access: User read⁽¹⁾
1
0
0
0
0
0
2.4.1 General
Each pin except PE0, PE1, and BKGD can act as general purpose I/O. In addition each pin can act as an
output or input of a peripheral module.
2.4.2 Registers
A set of configuration registers is common to all ports with exception of the ATD port (Table 2-59). All
registers can be written at any time, however a specific configuration might not become active.
S12P-Family Reference Manual, Rev. 1.12
100
Freescale Semiconductor