dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 695

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

MOS
MSB
MSP
NAMPS
OnCE™
PAL
PC
PCS
PGA
PLL
Pmem
PQFP
PROM
Freescale Semiconductor
metal oxide semiconductor
A semiconductor manufacturing technology that is used to make the transistors that compose
a microchip. This process is still used, but CMOS technology largely supersedes it.
most significant bit
The highest bit in a value: bit 31 for a 32-bit value, bit 7 for an 8-bit value, and so forth. See
also LSB.
most significant portion
In a multi-part value, the portion that occupies the highest numbered bits. For example, in a
32-bit value that is composed of two 16-bit portions, the most significant portion would be
the portion that occupies bits 31–16. See also LSP.
Narrowband Advanced Mobile Phone Service
A communications system, developed by Freescale, that is similar to AMPS. NAMPS uses a
narrower bandwidth channel and low-speed digital signaling for call supervision, which
increases efficiency and capacity as compared to AMPS.
On-Chip Emulation
See Enhanced On-Chip Emulation.
programmable array logic
A device that can be programmed to perform certain logic functions. Once the device is
programmed, the programmed information can never be changed. Sometimes a PAL is called
a PLD (programmable logic device).
program counter
A register in a processor that holds the address of the next instruction to execute in a program.
Personal Communications Service
A telecommunications standard that is used in North America. PCS is virtually identical to
the cellular standard, but it uses a different frequency.
pin grid array
A square, flat, ceramic or plastic package that is used to hold an integrated circuit. The
electrical leads, or pins, are located in a grid-like pattern on one of the flat sides.
phase-locked loop
An electronic circuit that controls an oscillator so that it maintains a constant phase angle
relative to a reference signal. A PLL can be used to multiply or divide an input clock
frequency to generate a different output frequency.
program (P) memory
The memory space where program instructions are stored. See also Xmem.
plastic quad flat pack
A square, flat, plastic package that is used to hold an integrated circuit. The electrical leads,
or pins, are located around all four sides of the package.
programmable read-only memory
A read-only memory device whose contents are programmed using specialized equipment.
The contents of the device are maintained even when electrical power is lost.
Glossary
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