Datasheet

23.0.5.49 Port H Reduced Drive Register (RDRH)
Read: Anytime.
Write: Anytime.
This register configures the drive strength of each Port H output pin as either full or reduced. If the
port is used as input this bit is ignored.
23.0.5.50 Port H Pull Device Enable Register (PERH)
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. This bit has no effect if the port is used as output. Out of reset no pull device is enabled.
Table 23-45. DDRH Field Descriptions
Field Description
7–0
DDRH[7:0]
Data Direction Port H
0 Associated pin is configured as input.
1 Associated pin is configured as output.
Note: Due to internal synchronization circuits, it can take up to 2 bus clock cycles until the correct value is read
on PTH or PTIH registers, when changing the DDRH register.
76543210
R
RDRH7 RDRH6 RDRH5 RDRH4 RDRH3 RDRH2 RDRH1 RDRH0
W
Reset 00000000
Figure 23-51. Port H Reduced Drive Register (RDRH)
Table 23-46. RDRH Field Descriptions
Field Description
7–0
RDRH[7:0]
Reduced Drive Port H
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
76543210
R
PERH7 PERH6 PERH5 PERH4 PERH3 PERH2 PERH1 PERH0
W
Reset 00000000
Figure 23-52. Port H Pull Device Enable Register (PERH)