MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 102

• Manufacturer Part Number: MC9S12Q
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 2 Port Integration Module (PIM9C32) Block Description
2.3.2.6.5
Read: Anytime.
Write: Anytime.
2.3.2.6.6
Read: Anytime.
Write: Anytime.
102
Module Base + 0x0034
Module Base + 0x0035
PERAD[7:0]
PPSAD[7:0]
Reset
Reset
Field
Field
7–0
7–0
W
W
R
R
PERAD7
PPSAD7
Pull Device Enable Port AD — This register configures whether a pull-up or a pull-down device is activated, if
the port is used as input. This bit has no effect if the port is used as output. Out of reset no pull device is enabled.
It is not possible to enable pull devices when a associated ATD channel is enabled simultaneously.
0 Pull-up or pull-down device is disabled.
1 Either a pull-up or pull-down device is enabled.
Pull Select Port AD — This register selects whether a pull-down or a pull-up device is connected to the pin.
0 A pull-up device is connected to the associated port AD pin, if enabled by the associated bit in register PERAD
1 A pull-down device is connected to the associated port AD pin, if enabled by the associated bit in register
0
0
7
7
and if the port is used as input.
PERAD and if the port is used as input.
Port AD Pull Device Enable Register (PERAD)
Port AD Polarity Select Register (PPSAD)
PERAD6
PPSAD6
Figure 2-44. Port AD Pull Device Enable Register (PERAD)
0
0
6
6
Figure 2-45. Port AD Polarity Select Register (PPSAD)
Table 2-36. PERAD Field Descriptions
Table 2-37. PPSAD Field Descriptions
PERAD5
PPSAD5
0
0
5
5
MC9S12Q128
PERAD4
PPSAD4
Rev 1.09
0
0
4
4
Description
Description
PERAD3
PPSAD3
0
0
3
3
PERAD2
PPSAD2
0
0
2
2
PERAD1
PPSAD1
Freescale Semiconductor
0
0
1
1
PERAD0
PPSAD0
0
0
0
0