Holtek BS66F340 - Page 222

Rev. 1.60 222 August 20, 2019 Rev. 1.60 223 August 20, 2019
BS66F340/BS66F350/BS66F360/BS66F370
Touch A/D Flash MCU with LED Driver
BS66F340/BS66F350/BS66F360/BS66F370
Touch A/D Flash MCU with LED Driver
CALL addr
Subroutine call
Description Unconditionally calls a subroutine at the specied address. The Program Counter then
increments by 1 to obtain the address of the next instruction which is then pushed onto the
stack. The specied 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 ag(s) None
CLR [m]
Clear Data Memory
Description Each bit of the specied Data Memory is cleared to 0.
Operation [m] ← 00H
Affected ag(s) None
CLR [m].i
Clear bit of Data Memory
Description Bit i of the specied Data Memory is cleared to 0.
Operation [m].i ← 0
Affected ag(s) None
CLR WDT
Clear Watchdog Timer
Description The TO, PDF ags and the WDT are all cleared.
Operation WDT cleared
TO ← 0
PDF ← 0
Affected ag(s) TO, PDF
CPL [m]
Complement Data Memory
Description Each bit of the specied 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 ag(s) Z
CPLA [m]
Complement Data Memory with result in ACC
Description Each bit of the specied 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 ag(s) Z
DAA [m]
Decimal-Adjust ACC for addition with result in Data Memory
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 ag 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 ag 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 ag conditions. Only the C ag
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 ag(s) C