MC9S12XDP512CFU
Model | MC9S12XDP512CFU |
Description | 16-BIT, FLASH, 40MHz, MICROCONTROLLER, PQFP80 |
PDF file | Total 1348 pages (File size: 8M) |
Chip Manufacturer | PHILIPS |
Chapter 24 DG128 Port Integration Module (S12XDG128PIMV2)
Table 24-36. RDRP Field Descriptions
Field
7–0
RDRP[7:0]
Description
Reduced Drive Port P
0 Full drive strength at output.
1 Associated pin drives at about 1/6 of the full drive strength.
24.0.5.38 Port P Pull Device Enable Register (PERP)
7
6
5
4
3
2
1
0
R
PERP7
W
Reset
0
0
0
0
0
0
0
0
PERP6
PERP5
PERP4
PERP3
PERP2
PERP1
PERP0
Figure 24-40. Port P Pull Device Enable Register (PERP)
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 24-37. PERP Field Descriptions
Field
7–0
PERP[7:0]
Description
Pull Device Enable Port P
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
24.0.5.39 Port P Polarity Select Register (PPSP)
7
6
5
4
3
2
1
0
R
PPSP7
W
Reset
0
0
0
0
0
0
0
0
PPSP6
PPSP5
PPSP4
PPSP3
PPSP2
PPSP1
PPSP0
Figure 24-41. Port P Polarity Select Register (PPSP)
Read: Anytime.
Write: Anytime.
This register serves a dual purpose by selecting the polarity of the active interrupt edge as well as selecting
a pull-up or pull-down device if enabled.
MC9S12XDP512 Data Sheet, Rev. 2.21
1014
Freescale Semiconductor