NXP Semiconductors PXN2020, Reference Manual, Page: 38 / 1376

PXN20 Microcontroller Reference Manual, Rev. 1
lx Freescale Semiconductor
The following descriptions are used in register bit field description tables:
Acronyms and Abbreviations
Table i lists acronyms and abbreviations used in this document.
R 0 Indicates a reserved bit field in a memory-mapped register. These bits are always read as 0.
W
R 1 Indicates a reserved bit field in a memory-mapped register. These bits are always read as 1.
W
R FIELDNAME Indicates a read/write bit in a memory-mapped register.
W
R FIELDNAME Indicates a read-only bit field in a memory-mapped register.
W
R Indicates a write-only bit field in a memory-mapped register.
W FIELDNAME
R FIELDNAME Write 1 to clear: indicates that writing a 1 to this bit field clears it.
W w1c
R FIELDNAME Read to clear: indicates that reading this bit field clears it, regardless of its returned value.
W r1c
R 0 Indicates a self-clearing bit.
W FIELDNAME
Table i. Acronyms and Abbreviated Terms
Term Meaning
ADC Analog-to-digital converter
ALU Arithmetic logic unit
BIST Built-in self test
DMA Direct memory access
EA Effective address
FIFO First-in, first-out
GPIO General-purpose I/O
I
2
C Inter-integrated circuit
IEEE Institute for Electrical and Electronics Engineers