Chapter 2 Port Integration Module (S12XEP100PIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
117
2.3.15
ECLK Control Register (ECLKCTL)
1
RDPB
Port B reduced drive
—Select reduced drive for outputs
This bit configures the drive strength of all output pins 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.
0
RDPA
Port A reduced drive
—Select reduced drive for outputs
This bit configures the drive strength of all output pins 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 0x001C (PRR)
Access: User read/write
(1)
1. Read: Anytime. In emulation modes, read operations will return the data from the external bus, in all other modes the data source
is depending on the data direction value.
Write: Anytime. In emulation modes, write operations will also be directed to the external bus.
7
6
5
4
3
2
1
0
R
NECLK
NCLKX2
DIV16
EDIV4
EDIV3
EDIV2
EDIV1
EDIV0
W
Reset
(2)
:
2. Reset values in emulation modes are identical to those of the target mode.
Mode
Depen-
dent
1
0
0
0
0
0
0
SS
0
1
0
0
0
0
0
0
ES
1
1
0
0
0
0
0
0
ST
0
1
0
0
0
0
0
0
EX
0
1
0
0
0
0
0
0
NS
1
1
0
0
0
0
0
0
NX
0
1
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 2-13. ECLK Control Register (ECLKCTL)
Table 2-15. RDRIV Register Field Descriptions (continued)
Field
Description
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