sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 129

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

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 associated
polarity select register (2.4.2.6/2-129).
The pull device becomes active only if the pin is used as an input or as a wired-or output. Some peripheral
module 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 becomes only 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.
Freescale Semiconductor
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 2-87. Illustration of I/O pin functionality
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
DDR
PTI
PT
data out
output enable
module enable
0
1
1
1
NOTE
0
0
PIN
Port Integration Module (S12HYPIMV1)
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