Chapter 2 Port Integration Module (S12XEPIMV1)
MC9S12XE-Family Reference Manual , Rev. 1.21
Freescale Semiconductor
115
Table 2-14. PUCR Register Field Descriptions
Field
Description
7
PUPKE
Pull-up Port K Enable—Enable pull-up devices on all Port K input pins
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are enabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.
6
BKPUE
BKGD pin pull-up Enable—Enable pull-up devices on BKGD pin
This bit congures whether a pull-up device is activated, if the pin is used as input. This bit has no effect if the pin is
used as outputs. Out of reset the pull-up device is enabled.
1 Pull-up device enabled.
0 Pull-up device disabled.
5
Reserved—
4
PUPEE
Pull-up Port E Enable—Enable pull-up devices on all Port E input pins except on pins 5 and 6 which have pull-down
devices only enabled during reset. This bit has no effect on these pins.
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are enabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.
3
PUPDE
Pull-up Port D Enable—Enable pull-up devices on all Port D input pins
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are disabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.
2
PUPCE
Pull-up Port C Enable—Enable pull-up devices on all Port C input pins
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are disabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.
1
PUPBE
Pull-up Port B Enable—Enable pull-up devices on all Port B input pins
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are disabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.
0
PUPAE
Pull-up Port A Enable—Enable pull-up devices on all Port A input pins
This bit congures whether pull-up devices are activated, if the pins are used as inputs. This bit has no effect if the
pins are used as outputs. Out of reset the pull-up devices are disabled.
1 Pull-up devices enabled.
0 Pull-up devices disabled.