mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 871

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

22.3.2.57 Port J Reduced Drive Register (RDRJ)
Read: Anytime.
Write: Anytime.
This register configures the drive strength of each port J output pin as either full or reduced. If the port is
used as input this bit is ignored.
22.3.2.58 Port J Pull Device Enable Register (PERJ)
Read: Anytime.
Write: Anytime.
This register configures whether a pull-up or a pull-down device is activated, if the port is used as input or
as wired-OR output. This bit has no effect if the port is used as push-pull output. Out of reset a pull-up
device is enabled.
Freescale Semiconductor
RDRJ[7:4]
RDRJ[2:0]
PERJ[7:4]
PERJ[2:0]
Reset
Reset
Field
Field
7–0
7–0
W
W
R
R
RDRJ7
PERJ7
Reduced Drive Port J
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
Pull Device Enable Port J
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
0
1
7
7
= Unimplemented or Reserved
= Unimplemented or Reserved
RDRJ6
PERJ6
Figure 22-60. Port J Pull Device Enable Register (PERJ)
0
1
6
6
Figure 22-59. Port J Reduced Drive Register (RDRJ)
Table 22-53. RDRJ Field Descriptions
Table 22-54. PERJ Field Descriptions
RDRJ5
PERJ5
MC9S12XDP512 Data Sheet, Rev. 2.17
0
1
5
5
RDRJ4
PERJ4
0
1
4
4
Description
Description
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
0
0
0
0
3
3
RDRJ2
PERJ2
0
1
2
2
RDRJ1
PERJ1
0
1
1
1
RDRJ0
PERJ0
0
1
0
0
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