Specifications

E–4 Glossary and Acronyms
Subject to Change – 17 January 1997
PGA
Pin grid array.
PLA
Programmable logic array.
PLD
Programmable logic device.
PLL
Phase-locked loop.
PQFP
Plastic quad flat pack.
primary cache
The cache that is the fastest and closest to the processor. The 21164 microprocessor
contains instruction, data, and unified instruction and data caches. Also called L1
cache.
RAM
Random-access memory.
RAS
Row address strobe.
region
One of four areas in physical memory space based on the two most significant,
implemented, physical address bits.