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參數資料
| 型號： | HTG2190 |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-Bit 1024 Pixel LCD Microcontroller |
| 中文描述： | 8位單片機1024像素LCD |
| 文件頁數： | 50/64頁 |
| 文件大小： | 417K |
| 代理商： | HTG2190 |
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CPLA [m]
Complement data memory and place result in accumulator
Description
Each bit of the specified data memory is logically complemented (1 s comple-
ment). Bits which previously contained a 1 are changed to 0 and vice-versa.
The complemented result is stored in the accumulator and the contents of
the data memory remains unchanged.
Operation
ACC
[m]
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
DAA [m]
Decimal-Adjust accumulator for addition
Description
The accumulator value is adjusted to the BCD (Binary Coded Decimal) code.
The accumulator is divided into two nibbles. Each nibble is adjusted to the
BCD code and an internal carry (AC1) will be done if the low nibble of the ac-
cumulator is greater than 9. The BCD adjustment is done by adding 6 to the
originalvalueiftheoriginalvalueisgreaterthan9oracarry(ACorC)isset;
otherwise the original value remains unchanged. The result is stored in the
data memory and only the carry flag (C) may be affected.
Operation
If (ACC.3~ACC.0) >9 or AC=1
then ([m].3~[m].0)
else ([m].3~[m].0)
and
If (ACC.7~ACC.4)+AC1 >9 or C=1
then ([m].7~[m].4)
else ([m].7~[m].4)
(ACC.3~ACC.0)+6, AC1=AC
(ACC.3~ACC.0), AC1=0
(ACC.7~ACC.4)+6+AC1, C=1
(ACC.7~ACC.4)+AC1, C=C
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
DEC [m]
Decrement data memory
Description
Data in the specified data memory is decremented by 1.
Operation
[m]
[m] 1
Affected flag(s)
TC2
TC1
TO
PD
OV
Z
AC
C
HTG2190
Rev. 1.00
50
June 29, 2001
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