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S3C72G9

SAM47 INSTRUCTION SET

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The SAM47 instruction set is specifically designed to support the large register files typically founded in most

KS57-series microcontrollers. The SAM47 instruction set includes 1-bit, 4-bit, and 8-bit instructions for data

manipulation, logical and arithmetic operations, program control, and CPU control. I/O instructions for peripheral

hardware devices are flexible and easy to use. Symbolic hardware names can be substituted as the instruction

operand in place of the actual address. Other important features of the SAM47 instruction set include:

— 1-byte referencing of long instructions (REF instruction)

— Redundant instruction reduction (string effect)

— Skip feature for ADC and SBC instructions

Instruction operands conform to the operand format defined for each instruction. Several instructions have multiple

operand formats.

Predefined values or labels can be used as instruction operands when addressing immediate data. Many of the

symbols for specific registers and flags may also be substituted as labels for operations such DA, mema, memb,

b, and so on. Using instruction labels can greatly simplify programming and debugging tasks.

 
  

In this section, the following SAM47 instruction set features are described in detail:

— Instruction reference area

— Instruction redundancy reduction

— Flexible bit manipulation

— ADC and SBC instruction skip condition




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