Chapter 4 Port Integration Module (S12XDP512PIMV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
248 Freescale Semiconductor
4.3.2.57 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.
4.3.2.58 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.
0x026B
76543210
R
RDRJ7 RDRJ6 RDRJ5 RDRJ4
0
RDRJ2 RDRJ1 RDRJ0
W
Reset 00000000
= Unimplemented or Reserved
Figure 4-59. Port J Reduced Drive Register (RDRJ)
Table 4-53. RDRJ Field Descriptions
Field Description
7–0
RDRJ[7:4]
RDRJ[2:0]
Reduced Drive Port J
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
0x026C
76543210
R
PERJ7 PERJ6 PERJ5 PERJ4
0
PERJ2 PERJ1 PERJ0
W
Reset 11110111
= Unimplemented or Reserved
Figure 4-60. Port J Pull Device Enable Register (PERJ)