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UPD17P136ACT Datasheet(PDF) 119 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) 119 Page - NEC

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CHAPTER 11 ARITHMETIC AND LOGIC UNIT (ALU)
100
11.7.2 Rotation to the Left
Rotation to the left is performed by using the addition instruction, “ADDC r, m”.
Example
MOV
PSW,
#0000B
; Resets CY flag to 0.
MOV
R1,
#1000B
; MSB
MOV
R2,
#0100B
MOV
R3,
#0010B
; LSB
ADDC
R3, R3
ADDC
R2, R2
ADDC
R1, R1
SKF
CY
OR
R3,
#0001B
The program code above rotates the 13 bits in R1, R2, and R3 to the left.



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