Holtek BS66F340 - Page 226

Rev. 1.60 226 August 20, 2019 Rev. 1.60 227 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
RRCA [m]
Rotate Data Memory right through Carry with result in ACC
Description Data in the specied Data Memory and the carry ag are rotated right by 1 bit. Bit 0 replaces
the Carry bit and the original carry ag is rotated into bit 7. The rotated result is stored in the
Accumulator and the contents of the Data Memory remain unchanged.
Operation ACC.i ← [m].(i+1); (i=0~6)
ACC.7 ← C
C ← [m].0
Affected ag(s) C
SBC A,[m]
Subtract Data Memory from ACC with Carry
Description The contents of the specied Data Memory and the complement of the carry ag are
subtracted from the Accumulator. The result is stored in the Accumulator. Note that if the
result of subtraction is negative, the C ag will be cleared to 0, otherwise if the result is
positive or zero, the C ag will be set to 1.
Operation ACC ← ACC − [m] − C
Affected ag(s) OV, Z, AC, C, SC, CZ
SBC A, x
Subtract immediate data from ACC with Carry
Description The immediate data and the complement of the carry ag are subtracted from the
Accumulator. The result is stored in the Accumulator. Note that if the result of subtraction is
negative, the C ag will be cleared to 0, otherwise if the result is positive or zero, the C ag
will be set to 1.
Operation ACC ← ACC – [m] – C
Affected ag(s) OV, Z, AC, C, SC, CZ
SBCM A,[m]
Subtract Data Memory from ACC with Carry and result in Data Memory
Description The contents of the specied Data Memory and the complement of the carry ag are
subtracted from the Accumulator. The result is stored in the Data Memory. Note that if the
result of subtraction is negative, the C ag will be cleared to 0, otherwise if the result is
positive or zero, the C ag will be set to 1.
Operation [m] ← ACC − [m] − C
Affected ag(s) OV, Z, AC, C, SC, CZ
SDZ [m]
Skip if decrement Data Memory is 0
Description The contents of the specied Data Memory are rst decremented by 1. If the result is 0 the
following instruction is skipped. As this requires the insertion of a dummy instruction while
the next instruction is fetched, it is a two cycle instruction. If the result is not 0 the program
proceeds with the following instruction.
Operation [m] ← [m] − 1
Skip if [m]=0
Affected ag(s) None
SDZA [m]
Skip if decrement Data Memory is zero with result in ACC
Description The contents of the specied Data Memory are rst decremented by 1. If the result is 0, the
following instruction is skipped. The result is stored in the Accumulator but the specied
Data Memory contents remain unchanged. As this requires the insertion of a dummy
instruction while the next instruction is fetched, it is a two cycle instruction. If the result is not 0,
the program proceeds with the following instruction.
Operation ACC ← [m] − 1
Skip if ACC=0
Affected ag(s) None