Operations:

Format

Syntax:

Operation:

Operands:

Architecture revision

Opcode

1

acall disp 

LR = PC + 2;
PC = *(ACBA + (ZE(disp8)<<2));
 
disp ∈ {0, 4, ..., 1020}

Rev1+

1101

disp8/Label

0000

4

8

4

Description

The ACALL instruction performs an application function call.

Status Flags:

Q:

Not affected

V:

Not affected

N:

Not affected

Z:

Not affected

C:

Not affected

Note:

ACBA must be word aligned. Failing to align ACBA correctly may lead to erronous be- havior.