MC9S12XDP512CFU
Model | MC9S12XDP512CFU |
Description | 16-BIT, FLASH, 40MHz, MICROCONTROLLER, PQFP80 |
PDF file | Total 1348 pages (File size: 8M) |
Chip Manufacturer | PHILIPS |
This register configures the drive strength of each port T output pin as either full or reduced. If the
port is used as input this bit is ignored.
Table 23-24. RDRT Field Descriptions
Field
7–0
RDRT[7:0]
Description
Reduced Drive Port T
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
23.0.5.21 Port T Pull Device Enable Register (PERT)
7
6
5
4
3
2
1
0
R
PERT7
W
Reset
0
0
0
0
0
0
0
0
PERT6
PERT5
PERT4
PERT3
PERT2
PERT1
PERT0
Figure 23-23. Port T Pull Device Enable Register (PERT)
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 23-25. PERT Field Descriptions
Field
7–0
PERT[7:0]
Description
Pull Device Enable Port T
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
23.0.5.22 Port T Polarity Select Register (PPST)
7
6
5
4
3
2
1
0
R
PPST7
W
Reset
0
0
0
0
0
0
0
0
PPST6
PPST5
PPST4
PPST3
PPST2
PPST1
PPST0
Figure 23-24. Port T Polarity Select Register (PPST)
Read: Anytime.
Write: Anytime.
This register selects whether a pull-down or a pull-up device is connected to the pin.