TMS320F datasheet(253/389 Pages) TI

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Subtract Short-Immediate Value From Auxiliary Register

SBRK

7-153

Assembly Language Instructions

Syntax

SBRK #

Short immediate addressing

Operands

8-bit positive short immediate value

SBRK #

987

6543

210

Execution

Increment PC, then ...

(current AR) – k

→ current AR

Note that k is an 8-bit positive constant.

Status Bits

None

Description

The 8-bit immediate value is subtracted, right justified, from the content of the

current auxiliary register (the one pointed to by the ARP) and the result re-

places the contents of the auxiliary register. The subtraction takes place in the

auxiliary register arithmetic unit (ARAU), with the immediate value treated as

an 8-bit positive integer. All arithmetic operations on the auxiliary registers are

unsigned.

Words

Cycles for a Single SBRK Instruction

ROM

DARAM

SARAM

External

1+p

Example

SBRK

#0FFh

Before Instruction

After Instruction

ARP

AR7

FF01h

Opcode

Cycles

TMS320F Datasheet(PDF) 253 Page - Texas Instruments

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