參數(shù)資料
型號(hào): ST52T301P
廠商: 意法半導(dǎo)體
英文描述: 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER
中文描述: 8位檢察官辦公室/存儲(chǔ)器DuaLogic]與藝術(shù)發(fā)展局和UART,定時(shí)器,可控硅控制器
文件頁(yè)數(shù): 94/100頁(yè)
文件大?。?/td> 497K
代理商: ST52T301P
SUBO
Subtraction with Offset
Format:
SUBO regi,regj
Operation:
regi <- regi- regj +128
Description:
The contents of the Register File register specified as source are subtractedfrom the
destinationregister in the RegisterFile, the value 128 is added to the result that is stored
in the destinationregister.This operationallows the use of the signed byte considering
the values between0 and 127 as negative,128 as0, and the values between 129 and
255 as positive.
Flags:
Z set if result is zero or if overflow occurs, clearedotherwise.
S setif underflowor overflow,cleared otherwise.
Bytes:
2
Cycles:
7
Example:
If the register 4 containsthe value 45 and the register11 containsthe value15, then the
instruction
SUBO 4,11
causes the register4 of the Register File to be loaded with the value 158.The value45
correspondsto -83, the value11 correspondsto -113;so the operationis equivalentto
perform-83 - (-113)= 30.As a matterof factthe result 158 correspondsto the value30.
If the register 4 containsthe value 50 and the register11 containsthe value200, the in-
struction causesthe register4 to be loaded with the value 234 (result+256) and the S
flag to be set.
If the register 4 containsthe value 200 and the register11 containsthe value 50, the in-
struction causesthe register4 to be loaded with the value 22 (result-256) and the S and
Z flags to be set.
10010011 0100|1011
94/99
ST52T301/E301
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