mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 961

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

PER0AD1[23:16]
RDR1AD1[15:8]
Reset
Reset
23.0.5.71 Port AD1 Reduced Drive Register 1 (RDR1AD1)
Read: Anytime.
Write: Anytime.
This register configures the drive strength of each PAD[15:8] output pin as either full or reduced.
If the port is used as input this bit is ignored.
23.0.5.72 Port AD1 Pull Up Enable Register 0 (PER0AD1)
Read: Anytime.
Write: Anytime.
This register activates a pull-up device on the respective PAD[23:16] pin if the port is used as input.
This bit has no effect if the port is used as output. Out of reset no pull-up device is enabled.
Field
Field
W
W
R
7–0
R
7–0
RDR1AD115 RDR1AD114 RDR1AD113 RDR1AD112 RDR1AD111 RDR1AD110 RDR1AD19
PER0AD123 PER0AD122 PER0AD121 PER0AD120 PER0AD119 PER0AD118 PER0AD117 PER0AD116
7
0
7
0
Reduced Drive Port AD1 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 AD1 Register 0
0 Pull-up device is disabled.
1 Pull-up device is enabled.
Figure 23-73. Port AD1 Reduced Drive Register 1 (RDR1AD1)
Figure 23-74. Port AD1 Pull Up Enable Register 0 (PER0AD1)
0
0
6
6
Table 23-64. RDR1AD1 Field Descriptions
Table 23-65. PER0AD1 Field Descriptions
5
0
5
0
0
0
4
4
Description
Description
3
0
3
0
0
0
2
2
1
0
1
0
RDR1AD18
0
0
0
0