D17133CS datasheet(235/289 Pages) NEC

235 / 289 page

CHAPTER 18

INSTRUCTION SET

220

(3)

SKGE m, #n4

Skip if data memory greater than or equal to immediate data

<1> OP code

11001

<2> Function

(m) –n4, skip if not borrow

Skips the next one instruction, if the data memory contents are equal to or greater than the immediate data

value (Executes as NOP instruction).

<3> Example

Executes RET, if 8-bit data stored in addresses 1FH (higher) and 2FH (lower) is greater than immediate data

'17H'; if not, executes RETSK:

MEM01E

MEM

0.1FH

MEM02F

MEM

0.2FH

SKGE

MEM01F, #1

RETSK

SKNE

MEM01F, #1

SKLT

MEM02F, #8

; 7+1

RET

RETSK

(4)

SKLT m, #n4

Skip if data memory less than immediate data

<1> OP code

11011

<2> Function

(m) –n4, skip if borrow

Skips the next one instruction, if the data memory contents are less than the immediate data value (Executes

as NOP instruction).

<3> Example

Stores 01H in address 0FH, if the address 10H contents are greater than immediate data '6'; if not, stores

02H in address 0FH:

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