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HT48R52A Datasheet(PDF) 26 Page - Holtek Semiconductor Inc

Part # HT48R52A
Description  44-pin QFP / LQFP
Download  36 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT48R52A Datasheet(HTML) 26 Page - Holtek Semiconductor Inc

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HT48R52A
Rev. 1.70
26
2014-04-03
DAA
[m]
Decimal-Adjust accumulator for addition
说明:
将累加器中的内容转换为
BCD(二进制转成十进制)码。如果低四位的值大于“9”或
AC=1,那么 BCD 调整就执行对原值加“6”,否则原值保持不变;如果高四位的值大于
9”或 C=1,那么 BCD 调整就执行对原值加“6”。BCD 转换实质上是根据累加器和
标志位执行
00H,06H,60H 或 66H 的加法运算,结果存放到数据存储器。只有进位标
志位
C 受影响,用来指示原始 BCD 的和是否大于 100,并可以进行双精度十进制数的
加法运算。
操作:
[m] ACC+00H 或 [m] ACC+06H
[m] ACC+60H 或 [m] ACC+66H
影响标志位:
C
DEC
[m]
Decrement data memory
说明:
将指定数据存储器的内容减
1。
运算过程:
[m]  [m]-1
影响标志位:
Z
DECA
[m]
Decrement data memory and place result in the accumulator
说明:
将指定数据存储器的内容减
1,把结果存放回累加器并保持指定数据存储器的内容不变。
运算过程:
ACC  [m]-1
影响标志位:
Z
HALT
Enter power down mode
说明:
此指令终止程序执行并关掉系统时钟,
RAM 和寄存器的内容保持原状态,WDT 计数器
和分频器被清“
0”,暂停标志位 PDF 被置位 1,WDT 溢出标志位 TO 被清 0。
运算过程:
PDF  1
TO  0
影响标志位:
TO、PDF
INC
[m]
Increment data memory
说明:
将指定数据存储器的内容加
1。
运算过程:
[m]  [m]+1
影响标志位:
Z
INCA
[m]
Increment data memory and place result in the accumulator
说明:
将指定数据存储器的内容加
1,结果存放回累加器并保持指定的数据存储器内容不变。
运算过程:
ACC  [m]+1
影响标志位:
Z
JMP addr
Directly jump
说明:
程序计数器的内容无条件地由被指定的地址取代,程序由新的地址继续执行。当新的地
址被加载时,必须插入一个空指令周期,所以此指令为
2 个周期的指令。
运算过程:
PC  addr
影响标志位:
MOV
A, [m]
Move data memory to the accumulator
说明:
将指定数据存储器的内容复制到累加器。


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