mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1027

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

PER0AD1[15:8]
RDR1AD1[7:0]
Reset
Reset
24.0.5.63 Port AD1 Reduced Drive Register 1 (RDR1AD1)
Read: Anytime.
Write: Anytime.
This register configures the drive strength of each PAD[7:0] output pin as either full or reduced. If
the port is used as input this bit is ignored.
24.0.5.64 Port AD1 Pull Up Enable Register 0 (PER0AD1)
Read: Anytime.
Write: Anytime.
This register activates a pull-up device on the respective PAD[15:8] 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
PER0AD115 PER0AD114 PER0AD113 PER0AD112 PER0AD111 PER0AD110 PER0AD19
RDR1AD17
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.
RDR1AD16
Figure 24-65. Port AD1 Reduced Drive Register 1 (RDR1AD1)
Figure 24-66. Port AD1 Pull Up Enable Register 0 (PER0AD1)
0
0
6
6
Table 24-57. RDR1AD1 Field Descriptions
Table 24-58. PER0AD1 Field Descriptions
RDR1AD15
5
0
5
0
RDR1AD14
0
0
4
4
Description
Description
RDR1AD13
3
0
3
0
RDR1AD12
0
0
2
2
RDR1AD11
1
0
1
0
RDR1AD10
PER0AD18
0
0
0
0