Acronyms and Glossary
A-7
N
N Newton(s)
NACK negative acknowledgment (data not valid)
NEMA National Electrical Manufacturers Association
nibble sequence of four adjacent bits treated as a unit
NVM nonvolatile memory
NVRAM nonvolatile RAM used to hold data over power loss
P
page logical group of bytes representing data stored in a tag. A page is a maximum of 128
bits
PC personal computer
PDT portable data terminal
PLL phase locked loop
protocol specified convention for the format of data messages communicated between devices
PWA printed wiring assembly
R
RAM random access memory
read process of acquiring data from a device; for example, from a tag or from computer
memory
reader controlled interrogating device capable of acquiring data from a device; for example,
acquiring and interrupting data from a tag
read zone physical area in which a tag can be read by the reader system
RF radio frequency
RFID radio frequency identification
ROM read-only memory
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