PXD10RM Datasheet, PDF (530/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 16-3. Revision (REV) Field Descriptions
Name
0-15
REV[0:15]
Description
Revision
The REV[0:15] field is specified by an input signal to define a software-visible revision number.
16.4.2.3 Miscellaneous Reset Status Register (MRSR)
The MRSR contains a bit for each of the reset sources to the device. An asserted bit indicates the last type
of reset that occurred. Only one bit is set at any time in the MRSR, reflecting the cause of the most recent
reset as signalled by device reset input signals. The MRSR can only be read from the IPS programming
model. Any attempted write is ignored.
See Figure 16-3 and Table 16-4 for the Miscellaneous Reset Status Register definition.
Register address: ECSM Base + 0x0F
0
1
2
3
4
5
6
7
R
POR
DIR
0
0
0
0
0
0
W
RESET:
*
*
0
0
0
0
0
0
= Unimplemented
Figure 16-3. Miscellaneous Reset Status (MRSR) Register
Table 16-4. Miscellaneous Reset Status (MRSR) Field Descriptions
Name
Description
0 Power-On Reset
POR 1 = Last recorded event was caused by a power-on reset (based on a device input signal)
1 Device Input Reset
DIR 1 = Last recorded event was a reset caused by a device input reset.
16.4.2.4 Miscellaneous Wakeup Control Register (MWCR)
Implementation of low-power modes and exit from these modes via an interrupt require communication
between the ECSM, the interrupt controller and external logic typically associated with phase-locked loop
clock generation circuitry. The Miscellaneous Wakeup Control Register (MWCR) provides an 8-bit
register controlling entry into these types of low-power modes as well as definition of the interrupt level
needed to exit the mode.
The following sequence of operations is generally needed to enable this functionality. Note that the exact
details are likely to be system-specific.
1. The processor core loads the appropriate data value into the MWCR, setting the ENBWCR bit and
the desired interrupt priority level.
16-4
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor