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參數資料
型號: HT48R50A
廠商: Holtek Semiconductor Inc.
元件分類: 數學處理器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數: 43/46頁
文件大小: 1037K
代理商: HT48R50A
SUB A,x
Subtract immediate data from the accumulator
Description
The immediate data specified by the code is subtracted from the contents of
the accumulator, leaving the result in the accumulator.
Operation
ACC
ACC+x+1
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
SWAP [m]
Swap nibbles within the data memory
Description
The low-order and high-order nibbles of the specified data memory (1 of the
data memories) are interchanged.
Operation
[m].3~[m].0
[m].7~[m].4
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
SWAPA [m]
Swap data memory and place result in the accumulator
Description
The low-order and high-order nibbles of the specified data memory are inter-
changed, writing the result to the accumulator. The contents of the data
memory remain unchanged.
Operation
ACC.3~ACC.0
ACC.7~ACC.4
[m].7~[m].4
[m].3~[m].0
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
SZ [m]
Skip if data memory is 0
Description
If the contents of the specified data memory are 0, the following instruction,
fetched during the current instruction execution, is discarded and a dummy
cycle is replaced to get the proper instruction (2 cycles). Otherwise proceed
with the next instruction (1 cycle).
Operation
Skip if [m]=0
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
HT48R50A-1
Rev. 1.10
43
July 2, 2001
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