mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 135

• Manufacturer Part Number: mc9s12ne64
• Description: Hcs12 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

This register defines whether the pin is used as an input or an output.
If a peripheral module controls the pin the contents of the data direction register is ignored
3.4.3
If the port is used as an output the register allows the configuration of the drive strength.
3.4.4
This register turns on a pull-up or pull-down device.
It becomes only active if the pin is used as an input or as a wired-or output.
3.4.5
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 or wired-or output. A pull-up device can also be
activated if the pin is used as a wired-or output.
3.4.6
This port is associated with the standard Timer.
In all modes, port T pins PT[7:4] can be used for either general-purpose I/O or standard timer I/O.
During reset, port T pins are configured as high-impedance inputs.
Freescale Semiconductor
Reduced Drive Register
Pull Device Enable Register
Polarity Select Register
Port T
Module
Figure 3-46. Illustration of I/O Pin Functionality
DDR
PTI
PT
MC9S12NE64 Data Sheet, Rev. 1.1
data out
output enable
module enable
0
1
1
1
0
0
PAD
Functional Description
(Figure
3-46).
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