PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
xxxv
nibble
A 4-bit data unit
byte
An 8-bit data unit
halfword
A 16-bit data unit
1
word
A 32-bit data unit
doubleword
A 64-bit data unit
x
In some contexts, such as signal encodings, x (without italics) indicates a “don’t
care” condition.
x
With italics, used to express an undefined alphanumeric value (e.g., a variable in
an equation); or a variable alphabetic character in a bit, register, or module name
(e.g., DSPI_
x
could refer to DSPI_A or DSPI_B).
n
Used to express an undefined numerical value; or a variable numeric character in
a bit, register, or module name (e.g., EIF
n
could refer to EIF1 or EIF0).
~
NOT logical operator
&
AND logical operator
|
OR logical operator
||
Field concatenation operator
OVERBAR
An overbar indicates that a signal is active-low.
Register Figure Conventions
This document uses the following conventions for the register reset values:
The following register fields are used:
1
The only exceptions to this appear in the discussion of serial communication modules that support variable-length data
transmission units. To simplify the discussion these units are referred to as words regardless of length.
w1c
Write 1 to clear the bit to 0.
—
Undefined at reset or “not applicable.”
U
Bit value is uninitialized upon reset.
u
Bit value is unchanged upon reset.
[
signal_name
]
Reset value is determined by the polarity of the indicated signal.
R
0
Indicates a reserved bit field in a memory-mapped register. These bits are always read as zeros.
W
R
1
Indicates a reserved bit field in a memory-mapped register. These bits are always read as ones.
W
R FIELDNAME
Indicates a read/write bit.
W
Summary of Contents for PXR4030
Page 1: ...PXR40 Microcontroller Reference Manual Devices Supported PXR4030 PXR4040 PXR40RM Rev 1 06 2011...
Page 30: ...PXR40 Microcontroller Reference Manual Rev 1 Freescale Semiconductor xxx...
Page 40: ...PXR40 Microcontroller Reference Manual Rev 1 xl Freescale Semiconductor...
Page 66: ...Memory Map PXR40 Microcontroller Reference Manual Rev 1 2 4 Freescale Semiconductor...
Page 120: ...Signal Descriptions 3 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 860: ...FlexCAN Module 24 50 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 1167: ...Decimation Filter Freescale Semiconductor 28 53 PXR40 Microcontroller Reference Manual Rev 1...
Page 1168: ...Decimation Filter 28 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
