Holtek BS66F340 - Page 228

Rev. 1.60 228 August 20, 2019 Rev. 1.60 229 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
SUBM A,[m]
Subtract Data Memory from ACC with result in Data Memory
Description The specied Data Memory is subtracted from the contents of 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]
Affected ag(s) OV, Z, AC, C, SC, CZ
SUB A,x
Subtract immediate data from ACC
Description The immediate data specied by the code is subtracted from the contents of 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 − x
Affected ag(s) OV, Z, AC, C, SC, CZ
SWAP [m]
Swap nibbles of Data Memory
Description The low-order and high-order nibbles of the specied Data Memory are interchanged.
Operation [m].3~[m].0 ↔ [m].7~[m].4
Affected ag(s) None
SWAPA [m]
Swap nibbles of Data Memory with result in ACC
Description The low-order and high-order nibbles of the specied Data Memory are interchanged. The
result is stored in the Accumulator. The contents of the Data Memory remain unchanged.
Operation ACC.3~ACC.0 ← [m].7~[m].4
ACC.7~ACC.4 ← [m].3~[m].0
Affected ag(s) None
SZ [m]
Skip if Data Memory is 0
Description If the contents of the specied Data Memory 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 Skip if [m]=0
Affected ag(s) None
SZA [m]
Skip if Data Memory is 0 with data movement to ACC
Description The contents of the specied Data Memory are copied to the Accumulator. If the value is zero,
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 ACC ← [m]
Skip if [m]=0
Affected ag(s) None
SZ [m].i
Skip if bit i of Data Memory is 0
Description If bit i of the specied Data Memory 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 Skip if [m].i=0
Affected ag(s) None