參數(shù)資料
型號(hào)： S3P1860-DK
元件分類： 微控制器/微處理器
英文描述： 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP20
封裝： 0.300 INCH, DIP-20
文件頁(yè)數(shù)： 33/95頁(yè)
文件大?。?/td> 339K
代理商： S3P1860-DK
S3C1840/C1850/C1860/P1860
INSTRUCTION SET
5-11
CPNZ
P0
Binary Code:
0 0 0 0
1 1 1 0
Description:
The instruction compares the contents of Port 0 with zero. Appropriate flags are set if their
values are not equal, i.e., if the contents of Port 0 are not zero.
The contents of the operand are unaffected by the comparison.
Operation:
(P0)
≠ 0
Flags:
SF : Set if not zero, cleared otherwise
SL : Unaffected
Example:
MOV
L,#0DH
CLRB
P2.(L)
; Clear P2.13, i.e., select P0 input
CPNZ
P0
; Compare P0 to zero
JP
KEYIN
; Jump to KEYIN if P0
≠ 0
JP
NOKEY
; Jump to NOKEY if P0 = 0
CPBT @HL,b
Binary Code:
0 0 1 1
1 0 d d
Description:
CPBT tests indirect data memory bit and sets appropriate flags if the bit value is one.
The contents of operand are unaffected by the test.
Operation:
M [(H,L)] = 1
Flags:
SF : Set if one, cleared otherwise
SL : Unaffected
Example:
MOV
H,#0H
MOV
L,#0BH
CPBT
@HL,3
; Test RAM address 0BH bit 3
JP
Q1
; Jump to Q1 if RAM address bit 3 is 1
JP
Q2
; Jump to Q2 if RAM address bit 3 is 0
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