PXN20RM Datasheet, PDF (38/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

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 FIELDNAME
W
r1c
Read to clear: indicates that reading this bit field clears it, regardless of its returned value.
R
0
W FIELDNAME
Indicates a self-clearing bit.
Acronyms and Abbreviations
Table i lists acronyms and abbreviations used in this document.
Table i. Acronyms and Abbreviated Terms
Term
ADC
ALU
BIST
DMA
EA
FIFO
GPIO
I²C
IEEE
Meaning
Analog-to-digital converter
Arithmetic logic unit
Built-in self test
Direct memory access
Effective address
First-in, first-out
General-purpose I/O
Inter-integrated circuit
Institute for Electrical and Electronics Engineers
PXN20 Microcontroller Reference Manual, Rev. 1
lx
Freescale Semiconductor