Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
140
Freescale Semiconductor
2.3.48
Port P Reduced Drive Register (RDRP)
2.3.49
Port P Pull Device Enable Register (PERP)
Address 0x025B
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
RDRP7
RDRP6
RDRP5
RDRP4
RDRP3
RDRP2
RDRP1
RDRP0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-46. Port P Reduced Drive Register (RDRP)
Table 2-44. RDRP Register Field Descriptions
Field
Description
7-0
RDRP
Port P reduced drive
—Select reduced drive for outputs
This register configures the drive strength of output pins 7 through 0 as either full or reduced. If a pin is used as input
this bit has no effect.
1 Reduced drive selected (approx. 1/5 of the full drive strength).
0 Full drive strength enabled.
Address 0x025C
Access: User read/write
(1)
1. Read: Anytime.
Write: Anytime.
7
6
5
4
3
2
1
0
R
PPSP7
PPSP6
PPSP5
PPSP4
PPSP3
PPSP2
PPSP1
PPSP0
W
Reset
0
0
0
0
0
0
0
0
Figure 2-47. Port P Pull Device Enable Register (PERP)
Table 2-45. PERP Register Field Descriptions
Field
Description
7-0
PERP
Port P pull device enable
—Enable pull devices on input pins
These bits configure whether a pull device is activated, if the associated pin is used as an input. This bit has no effect
if the pin is used as an output. Out of reset no pull device is enabled.
1 Pull device enabled.
0 Pull device disabled.
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages