PXS20RM Datasheet, PDF (1325/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Field
SMC
APC
PA[1:0]
OBE
IBE
ODE
SRC
WPE
WPS
System Integration Unit Lite (SIUL)
Table 47-10. PCR0 Field Descriptions
Description
Safe Mode Control
This bit supports the overriding of the automatic deactivation of the output buffer of the associated
pad upon entering SAFE mode of the SoC.
1: In SoC SAFE mode, the output buffer remains functional.
0: In SoC SAFE mode, the output buffer of the pad is disabled.
Analog Pad Control
This bit enables the usage of the pad as analog input.
1: Analog input path switch can be enabled by the ADC.
0: Analog input path from the pad is gated and can not be used.
Pad Output Assignment
This field is used to select the function that is allowed to drive the output of a multiplexed pad. The
PA field size can vary from zero to two bits, depending on the number of output functions
associated with this pad.
00: Alternative Mode 0: GPIO.
01: Alternative Mode 1
10: Alternative Mode 2
11: Alternative Mode 3
Note: Number of bit depending of the number of actual alternate function. Please refer to
datasheet
Output Buffer Enable
This bit enables the output buffer of the pad in case the pad is in GPIO mode.
1: Output Buffer of the pad is enabled when PA = 00.
0: Output Buffer of the pad is disabled when PA = 00.
Input Buffer Enable
This bit enables the input buffer of the pad.
1: Input Buffer of the pad is enabled.
0: Input Buffer of the pad is disabled.
Open Drain Output Enable
This bit controls output driver configuration for the pads connected to this signal. Either open drain
or push/pull driver configurations can be selected. This feature applies to output pads only.
1: Open drain enable signal is asserted for the pad.
0: Open drain enable signal is negated for the pad.
Slew Rate Control
SRC = 0 Slowest configuration
SRC = 1 Fastest configuration
Weak Pull Up/Down Enable
This bit controls whether the weak pull up/down devices are enabled/disabled for the pad
connected to this signal.
1: Weak pull device enable signal is asserted for the pad.
0: Weak pull device enable signal is negated for the pad.
Weak Pull Up/Down Select
This bit controls whether weak pull up or weak pull down devices are used for the pads connected
to this signal when weak pull up/down devices are enabled.
1: The pull up enabled.
0: The pull down enabled.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
47-11