MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 160

• Manufacturer Part Number: MC9S12E32CFU
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 3 Port Integration Module (PIM9E128V1)
Figure 3-50
analog module is enabled all associated digital output ports are disabled and all associated digital input
ports read “1”.
3.4.4
If the port is used as an output the Reduced Drive Register allows the configuration of the drive strength.
3.4.5
The Pull Device Enable Register turns on a pull-up or pull-down device. The pull device becomes active
only if the pin is used as an input or as a wired-or output.
160
Reduced Drive Register
Pull Device Enable Register
shows the state of digital inputs and outputs when an analog module drives the port. When the
Analog
Module
Figure 3-49. Illustration of I/O Pin Functionality
Figure 3-50. Digital Ports and Analog Module
Module
Enable
Module
Digital
DDRx
PTIx
PTx
Analog
Output
MC9S12E128 Data Sheet, Rev. 1.07
data out
output enable
module enable
0
1
Output
Digital
Digital
Input
0
1
0
1
PIM Boundary
1
0
1
0
1
PAD
PAD
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