PXD20RM Datasheet, PDF (1479/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Field
ODE
SRC[1:0]
WPE
WPS
Table 43-10. PCRx Field Descriptions (continued)
Description
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
This field controls the slew rate control output signals from the SIUL. The output signals are driven
to the value of this field. The actual slew rates are defined by the implementation of the pad
devices for a given SoC.
Note: For low-power modes, keeping these bits asserted may result in more leakage. It is
recommended to not drive these bits during low-power modes.
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 enabled for the pad.
0: Weak pull device disabled 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: Weak pull-up selected
0: Weak pull-down selected
43.5.3.9 Pad Configuration Registers (PCR185–PCR281)
The non-GPIO and special functions pins have dedicated Pad Configuration Registers that allow
configuration of the electrical characteristics associated with the pads. Each PCR controls the
characteristics of a single pad.
Figure 43-12. Pad Configuration Register (PCR) definition for PCR185–281
Pad type
Nexus
DDR
RSDS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
SMC
SMC
SMC
OBE IBE
ODE
ODE
ODE
SRC[1:0] WPE WPS
SRC[2:0]
WPE WPS
SRC[1:0] WPE WPS
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
43-13