MPC5604B/C Microcontroller Reference Manual, Rev. 8
340 Freescale Semiconductor
Table 19-11. PCRx field descriptions
Field Description
SMC 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 device.
0 In SAFE mode, the output buffer of the pad is disabled.
1 In SAFE mode, the output buffer remains functional.
APC Analog Pad Control.
This bit enables the usage of the pad as analog input.
0 Analog input path from the pad is gated and cannot be used
1 Analog input path switch can be enabled by the ADC
PA[1:0] Pad Output Assignment
This field is used to select the function that is allowed to drive the output of a multiplexed pad.
00 Alternative Mode 0 — GPIO
01 Alternative Mode 1 — See the signal description chapter
10 Alternative Mode 2 — See the signal description chapter
11 Alternative Mode 3 — See the signal description chapter
Note: Number of bits depends on the actual number of actual alternate functions. Please see data
sheet.
OBE Output Buffer Enable
This bit enables the output buffer of the pad in case the pad is in GPIO mode.
0 Output buffer of the pad is disabled when PA[1:0] = 00
1 Output buffer of the pad is enabled when PA[1:0] = 00
IBE Input Buffer Enable
This bit enables the input buffer of the pad.
0 Input buffer of the pad is disabled
1 Input buffer of the pad is enabled
ODE 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.
0 Pad configured for push/pull output
1 Pad configured for open drain
SRC Slew Rate Control
This field controls the slew rate of the associated pad when it is slew rate selectable. Its usage is
the following:
0 Pad configured as slow (default)
1 Pad is configured as medium or fast (depending on the pad)
Note: PC[1] (TDO pad) is medium only. By default SRC = 0, and writing ‘1’ has no effect.
WPE 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.
0 Weak pull device disabled for the pad
1 Weak pull device enabled for the pad
WPS 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.
0 Weak pull-down selected
1 Weak pull-up selected
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