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Texas Instruments MSP50C6xx User Manual

Page 158

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Symbol

Meaning

n

R

Value in repeat counter loaded by RPT instructions

ns

Value in string register STR

OF

Overflow flag

offset[n]

n bit offset from a reference register.

OM

Overflow mode

PC

Program counter, 16 bits

pma[n]

n bit program memory address. For example, pma8 means 8-bit program memory address. If n is
not specified, defaults to pma16.

port[n]

n bit I/O port address. Certain instructions multiply this port address by 4.

PH

Product high register, 16 bits

PL

Product low register, 16 bits (cannot be read/written directly)

R

Rx register treated as a general purpose register. This bit is not related to any addressing mode.

RCF

Register carry flag

Rx

Indirect register x where x = 0..7

RZF

Register zero flag

s

Represents string mode if 1, otherwise normal mode.

SF

Sign flag

STAT

Status register, 17 bits

STR

String register, 8 bits

SV

Shift value register, 4 bits

TAG

Memory tag

TF1

Test flag 1

TF2

Test flag 2

TOS

Top of stack register, 16 bits

UM

Unsigned mode

w

Word(s) taken by instruction

x

Don’t care

XM

Extended sign mode

XSF

Transfer (TX) sign flag

XZF

Transfer (TX) zero flag

ZF

Zero flag