mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 875

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

22.3.2.64 Port AD0 Reduced Drive Register 1 (RDR1AD0)
Read: Anytime.
Write: Anytime.
This register configures the drive strength of each output pin PAD[07:00] as either full or reduced. If the
port is used as input this bit is ignored.
22.3.2.65 Port AD0 Pull Up Enable Register 1 (PER1AD0)
Read: Anytime.
Write: Anytime.
This register activates a pull-up device on the respective pin PAD[07:00] if the port is used as input. This
bit has no effect if the port is used as output. Out of reset no pull device is enabled.
Freescale Semiconductor
RDR1AD0[7:0]
PER1AD0[7:0]
Reset
Reset
Field
Field
7–0
7–0
W
W
R
R
RDR1AD07
PER1AD07
0
0
7
7
Reduced Drive Port AD0 Register 1
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
Pull Device Enable Port AD0 Register 1
0 Pull-up device is disabled.
1 Pull-up device is enabled.
RDR1AD06
PER1AD06
Figure 22-66. Port AD0 Reduced Drive Register 1 (RDR1AD0)
Figure 22-67. Port AD0 Pull Up Enable Register 1 (PER1AD0)
0
0
6
6
Table 22-59. RDR1AD0 Field Descriptions
Table 22-60. PER1AD0 Field Descriptions
RDR1AD05
PER1AD05
MC9S12XDP512 Data Sheet, Rev. 2.17
0
0
5
5
RDR1AD04
PER1AD04
0
0
4
4
Description
Description
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
RDR1AD03
PER1AD03
0
0
3
3
RDR1AD02
PER1AD02
0
0
2
2
RDR1AD01
PER1AD01
0
0
1
1
RDR1AD00
PER1AD00
0
0
0
0
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