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HT37B90 データシート(PDF) 66 Page - Holtek Semiconductor Inc

部品番号 HT37B90
部品情報  HT37B90
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メーカー  HOLTEK [Holtek Semiconductor Inc]
ホームページ  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT37B90 データシート(HTML) 66 Page - Holtek Semiconductor Inc

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HT37B90/HT37B70/HT37B50/HT37B30
Rev.1.00
66
June22,2017
BitOperations
The ability to provide single bit operations on Data Mem-
ory is an extremely flexible feature of all Holtek
microcontrollers. This feature is especially useful for
output port bit programming where individual bits or port
pins can be directly set high or low using either the
²SET
[m].i
² or ²CLR [m].i² instructions respectively. The fea-
ture removes the need for programmers to first read the
8-bit output port, manipulate the input data to ensure
that other bits are not changed and then output the port
with the correct new data. This read-modify-write pro-
cess is taken care of automatically when these bit oper-
ationinstructionsareused.
TableReadOperations
Data storage is normally implemented by using regis-
ters. However, when working with large amounts of
fixed data, the volume involved often makes it inconve-
nient to store the fixed data in the Data Memory. To over-
come this problem, Holtek microcontrollers allow an
area of Program Memory to be setup as a table where
data can be directly stored. A set of easy to use instruc-
tions provides the means by which this fixed data can be
referencedandretrievedfromtheProgramMemory.
OtherOperations
In addition to the above functional instructions, a range
of other instructions also exist such as the
²HALT² in-
struction for Power-down operations and instructions to
control the operation of the Watchdog Timer for reliable
program operations under extreme electric or electro-
magnetic environments. For their relevant operations,
refertothefunctionalrelatedsections.
InstructionSetSummary
The following table depicts a summary of the instruction
set categorised according to function and can be con-
sulted as a basic instruction reference using the follow-
inglistedconventions.
Tableconventions:
x:Bitsimmediatedata
m:DataMemoryaddress
A:Accumulator
i:0~7numberofbits
addr:Programmemoryaddress
Mnemonic
Description
Cycles
FlagAffected
Arithmetic
ADDA,[m]
ADDM A,[m]
ADDA,x
ADCA,[m]
ADCM A,[m]
SUBA,x
SUBA,[m]
SUBM A,[m]
SBC A,[m]
SBCM A,[m]
DAA [m]
AddDataMemoryto ACC
Add ACC toDataMemory
Addimmediatedatato ACC
AddDataMemoryto ACC withCarry
Add ACC toDatamemorywithCarry
Subtractimmediatedatafromthe ACC
SubtractDataMemoryfrom ACC
SubtractDataMemoryfrom ACC withresultinDataMemory
SubtractDataMemoryfrom ACC withCarry
SubtractDataMemoryfrom ACC withCarry,resultinDataMemory
Decimaladjust ACC forAdditionwithresultinDataMemory
1
1
Note
1
1
1
Note
1
1
1
Note
1
1
Note
1
Note
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
Z,C,AC,OV
C
LogicOperation
ANDA,[m]
ORA,[m]
XORA,[m]
ANDM A,[m]
ORM A,[m]
XORM A,[m]
ANDA,x
ORA,x
XORA,x
CPL [m]
CPLA [m]
LogicalANDDataMemoryto ACC
LogicalORDataMemoryto ACC
LogicalXORDataMemoryto ACC
LogicalAND ACC toDataMemory
LogicalOR ACC toDataMemory
LogicalXOR ACC toDataMemory
LogicalANDimmediateDatato ACC
LogicalORimmediateDatato ACC
LogicalXORimmediateDatato ACC
ComplementDataMemory
ComplementDataMemorywithresultin ACC
1
1
1
1
Note
1
Note
1
Note
1
1
1
1
Note
1
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Increment&Decrement
INCA[m]
INC[m]
DECA [m]
DEC[m]
IncrementDataMemorywithresultin ACC
IncrementDataMemory
DecrementDataMemorywithresultin ACC
DecrementDataMemory
1
1
Note
1
1
Note
Z
Z
Z
Z


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