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UPD17P136ACT Datasheet(PDF) 117 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 117 Page - NEC

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CHAPTER 11 ARITHMETIC AND LOGIC UNIT (ALU)
98
11.6.4 “Less Than” Judgement
The “less than” judement instruction (SKLT m, #n4) is used to determine if the contents of a location in data memory
is a value less than that of the immediate data operand. If the value in data memory is less than that of the immediate
data, this instruction causes the next instruction to be skipped.
Example
MOV
M1,
#1000B
SKLT
M1,
#1001B
; (1)
BR
A
BR
B
;
SKLT
M1,
#1000B
; (2)
BR
C
BR
D
;
SKLT
M1,
#0111B
; (3)
BR
E
BR
F
In this example, the program will first branch to B since the value in data memory is less than that of
the immediate data. Next it will branch to C since the value in data memory is equal to that of the
immediate data. Last it will branch to E since the value in data memory is greater than that of the
immediate data.



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