mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 894

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1. Read: Anytime.
1. Read: Always reads 0x00
Chapter 19 Port Integration Module (S12XFPIMV2)
19.3.76 Port AD Pull Up Enable Register 1 (PER1AD)
19.3.77 PIM Reserved Register
19.4
19.4.1
Each pin except PE0, PE1, and BKGD can act as general purpose I/O. In addition each pin can act as an
output from the external bus interface module or a peripheral module or an input to the external bus
interface module or a peripheral module.
894
Address 0x0277
Address 0x0278 - 0x027F
PER1AD
Write: Anytime.
Write: Unimplemented
Field
Reset
Reset
7-0
W
W
R
R
PER1AD7
Functional Description
Port AD pull device enable—Enable pull devices on input pins
These bits configure whether a pull device is activated, if the associated pin is used as an input. This bit has no effect
if the pin is used as an output. Out of reset no pull device is enabled.
1 Pull device enabled.
0 Pull device disabled.
General
0
0
0
7
7
= Unimplemented or Reserved
PER1AD6
Figure 19-74. Port AD Pull Up Enable Register 1 (PER1AD)
0
0
0
6
6
Table 19-65. PER1AD Register Field Descriptions
MC9S12XF - Family Reference Manual, Rev.1.19
PER1AD5
Figure 19-75. PIM Reserved Register
0
0
0
5
5
PER1AD4
0
0
0
4
4
Description
PER1AD3
3
0
3
0
0
PER1AD2
0
0
0
2
2
PER1AD1
Access: User read/write
Freescale Semiconductor
0
0
0
1
1
Access: User read
PER1AD0
0
0
0
0
0
(1)
(1)