MC9S12XDP512CFU
Model | MC9S12XDP512CFU |
Description | 16-BIT, FLASH, 40MHz, MICROCONTROLLER, PQFP80 |
PDF file | Total 1348 pages (File size: 8M) |
Chip Manufacturer | PHILIPS |
Chapter 22 DP512 Port Integration Module (S12XDP512PIMV2)
22.3.2.49 Port H Reduced Drive Register (RDRH)
7
6
5
4
3
2
1
0
R
RDRH7
W
Reset
0
0
0
0
0
0
0
0
RDRH6
RDRH5
RDRH4
RDRH3
RDRH2
RDRH1
RDRH0
Figure 22-51. 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.
Table 22-46. RDRH Field Descriptions
Field
7–0
RDRH[7:0]
Description
Reduced Drive Port H
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
22.3.2.50 Port H Pull Device Enable Register (PERH)
7
6
5
4
3
2
1
0
R
PERH7
W
Reset
0
0
0
0
0
0
0
0
PERH6
PERH5
PERH4
PERH3
PERH2
PERH1
PERH0
Figure 22-52. 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 22-47. PERH Field Descriptions
Field
7–0
PERH[7:0]
Description
Pull Device Enable Port H
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
MC9S12XDP512 Data Sheet, Rev. 2.21
864
Freescale Semiconductor