EM78P372KSS20 datasheet(97/118 Pages) EMC

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EM78P372K

8-bit Microcontroller

Product Specification (V1.4) 05.11.2016

 89

(This specification is subject to change without prior notice)

7.15

Instruction Set

Each instruction in the instruction set is a 13-bit word divided into an OP code and one

or more operands. Normally, all instructions are executed within one single instruction

cycle (one instruction consists of two oscillator time periods), unless the program

counter is changed by instructions "MOV R2,A," "ADD R2,A," or by instructions of

arithmetic or logic operation on R2 (e.g., "SUB R2,A," "BS(C) R2,6," "CLR R2," etc.).

In addition, the instruction set has the following features:

1. Every bit of any register can be set, cleared, or tested directly.

2. The I/O registers can be regarded as general registers. That is, the same

instruction can operate on I/O registers.

The following symbols are used in the Instruction Set table:

Convention:

R = Register designator that specifies which one of the registers (including operation and general

purpose registers) is to be utilized by the instruction.

Bits 6 and 7 in R4 determine the selected register bank.

b = Bit field designator that selects the value for the bit located in the register R and which affects

the operation.

k = 8 or 10-bit constant or literal value

Mnemonic

Operation

Status Affected

NOP

No Operation

None

DAA

Decimal Adjust A

CONTW

 CONT

None

SLEP

 WDT, Stop oscillator

T, P

WDTC

 WDT

T, P

IOW R

 IOCR

None

ENI

Enable Interrupt

None

DISI

Disable Interrupt

None

RET

[Top of Stack]

 PC

None

RETI

[Top of Stack]

 PC, Enable Interrupt

None

CONTR

CONT

 A

None

IOR R

IOCR

 A

None

MOV R,A

 R

None

CLRA

 A

CLR R

 R

SUB A,R

R-A

 A

Z, C, DC

SUB R,A

R-A

 R

Z, C, DC

DECA R

R-1

 A

DEC R

R-1

 R

OR A,R

 VR  A

OR R,A

 VR  R

AND A,R

A & R

 A

AND R,A

A & R

 R

XOR A,R

 R  A

XOR R,A

 R  R

EM78P372KSS20 Datasheet(PDF) 97 Page - ELAN Microelectronics Corp

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