Holtek HT67F2350 Manual page 273

HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
CALL addr Subroutine call
Description Unconditionally calls a subroutine at the specified address. The Program Counter then
increments by 1 to obtain the address of the next instruction which is then pushed onto the
stack. The specified address is then loaded and the program continues execution from this
new address. As this instruction requires an additional operation, it is a two cycle instruction.
Operation Stack ← Program Counter + 1
Program Counter ← addr
Affected flag(s) None
CLR [m] Clear Data Memory
Description Each bit of the specified Data Memory is cleared to 0.
Operation [m] ← 00H
Affected flag(s) None
CLR [m].i Clear bit of Data Memory
Description Bit i of the specified Data Memory is cleared to 0.
Operation [m].i ← 0
Affected flag(s) None
Clear Watchdog Timer
CLR WDT
Description The TO, PDF flags and the WDT are all cleared.
Operation WDT cleared
TO ← 0
PDF ← 0
Affected flag(s) TO, PDF
Complement Data Memory
CPL [m]
Description Each bit of the specified Data Memory is logically complemented (1's complement). Bits which
previously contained a 1 are changed to 0 and vice versa.
Operation [m] ← [m]
Affected flag(s) Z
CPLA [m] Complement Data Memory with result in ACC
Description Each bit of the specified Data Memory is logically complemented (1's complement). 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 remain unchanged.
Operation ACC ← [m]
Affected flag(s) Z
Decimal-Adjust ACC for addition with result in Data Memory
DAA [m]
Description Convert the contents of the Accumulator value to a BCD (Binary Coded Decimal) value
resulting from the previous addition of two BCD variables. If the low nibble is greater than 9
or if AC flag is set, then a value of 6 will be added to the low nibble. Otherwise the low nibble
remains unchanged. If the high nibble is greater than 9 or if the C flag is set, then a value of 6
will be added to the high nibble. Essentially, the decimal conversion is performed by adding
00H, 06H, 60H or 66H depending on the Accumulator and flag conditions. Only the C flag
may be affected by this instruction which indicates that if the original BCD sum is greater than
100, it allows multiple precision decimal addition.
Operation [m] ← ACC + 00H or
[m] ← ACC + 06H or
[m] ← ACC + 60H or
[m] ← ACC + 66H
Affected flag(s) C
Rev. 1.60 273 May 16, 2019