PXD20RM Datasheet, PDF (46/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

This document uses the following conventions for the register reset values in register figures:
—
Bit value is undefined at reset.
U
Bit value is unchanged by reset. Previous value preserved during reset.
[signal_name]
Reset value is determined by the polarity of the indicated signal.
The following descriptions are used in register bit field description tables:
R0
W
Indicates a reserved bit field in a memory-mapped register. These bits are always read
as 0.
R1
W
Indicates a reserved bit field in a memory-mapped register. These bits are always read
as 1.
R FIELDNAME
W
Indicates a read/write bit in a memory-mapped register.
R FIELDNAME
W
Indicates a read-only bit field in a memory-mapped register.
R
W FIELDNAME
Indicates a write-only bit field in a memory-mapped register.
R FIELDNAME
W
w1c
Write 1 to clear: indicates that writing a 1 to this bit field clears it.
R
0
W FIELDNAME
Indicates a self-clearing bit.
Acronyms and abbreviated terms
The following table lists some acronyms and abbreviations used in this document.
Term
GPIO
IEEE
JEDEC
JTAG
Mux
Rx
RTL
Meaning
General-purpose I/O
Institute for Electrical and Electronics Engineers
Joint Electron Device Engineering Council
Joint Test Action Group
Multiplex
Receive
Register transfer language
PXD20 Microcontroller Reference Manual, Rev. 1
xlvi
Freescale Semiconductor
Preliminary—Subject to Change Without Notice