TMS320F datasheet(363/389 Pages) TI

363 / 389 page

Glossary

D-3

Glossary

C bit:

See

carry bit.

CALU:

See

central arithmetic logic unit (CALU).

carry bit:

Bit 9 of status register ST1; used by the CALU for extended

arithmetic operations and accumulator shifts and rotates. The carry bit

can be tested by conditional instructions.

central arithmetic logic unit (CALU):

The 32-bit wide main arithmetic logic

unit for the ’C24x CPU that performs arithmetic and logic operations. It

accepts 32-bit values for operations, and its 32-bit output is held in the

accumulator.

CLKIN:

Input clock signal. A clock source signal supplied to the on-chip

clock generator at the CLKIN/X2 pin or generated internally by the

on-chip oscillator. The clock generator divides or multiplies CLKIN to

produce the CPU clock signal, CLKOUT1.

CLKOUT:

Master clock output signal. The output signal of the on-chip clock

generator. The CLKOUT1 high pulse signifies the CPU’s logic phase

(when internal values are changed), and the CLKOUT1 low pulse

signifies the CPU’s latch phase (when the values are held constant).

clock mode (clock generator):

One of the modes which sets the internal

CPU clock frequency to a fraction or multiple of the frequency of the input

clock signal CLKIN.

CNF bit:

DARAM configuration bit. Bit 12 in status register ST1. CNF is used

to determine whether the on-chip RAM block B0 is mapped to program

space or data space.

codec:

A device that codes in one direction of transmission and decodes in

another direction of transmission.

COFF:

Common object file format. A system of files configured according to

a standard developed by AT&T. These files are relocatable in memory

space.

context saving/restoring:

Saving the system status when the device

enters a subroutine (such as an interrupt service routine) and restoring

the system status when exiting the subroutine. On the ’C24x, only the

program counter value is saved and restored automatically; other

context saving and restoring must be performed by the subroutine.

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