SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 120

• Manufacturer Part Number: SC9S12XS256J1MAA
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Port Integration Module (S12XSPIMV1)
2.4.2.4
If the pin is used as an output this register allows the configuration of the drive strength independent of the
use with a peripheral module.
2.4.2.5
This register turns on a pull-up or pull-down device on the related pins determined by the
associatedpolarity select register (2.4.2.5/2-120).
The pull device becomes active only if the pin is used as an input or as a wired-or output. Some peripheral
modules only allow certain configurations of pull devices to become active. Refer to the respective bit
descriptions.
2.4.2.6
This register selects either a pull-up or pull-down device if enabled.
It only becomes active if the pin is used as an input. A pull-up device can be activated if the pin is used as
a wired-or output.
120
Reduced drive register (RDRx)
Pull device enable register (PERx)
Polarity select register (PPSx)
Due to internal synchronization circuits, it can take up to 2 bus clock cycles
until the correct value is read on port data or port input registers, when
changing the data direction register.
Module
Figure 2-73. Illustration of I/O pin functionality
DDR
PTI
PT
S12XS Family Reference Manual, Rev. 1.09
data out
output enable
module enable
0
1
1
1
NOTE
0
0
PIN
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