Holtek BC68F2130 Manual page 144

LSNZ [m] Skip if Data Memory is not 0
Description If the content of the specified Data Memory is not 0, the following instruction is skipped. As
this requires the insertion of a dummy instruction while the next instruction is fetched, it is a
three cycle instruction. If the result is 0 the program proceeds with the following instruction.
Operation Skip if [m] ≠ 0
Affected flag(s) None
LSUB A,[m] Subtract Data Memory from ACC
Description The specified Data Memory 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 flag will be
cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1.
Operation ACC ← ACC − [m]
Affected flag(s) OV, Z, AC, C, SC, CZ
Subtract Data Memory from ACC with result in Data Memory
LSUBM A,[m]
Description The specified 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 flag will be
cleared to 0, otherwise if the result is positive or zero, the C flag will be set to 1.
Operation [m] ← ACC − [m]
Affected flag(s) OV, Z, AC, C, SC, CZ
LSWAP [m] Swap nibbles of Data Memory
Description The low-order and high-order nibbles of the specified Data Memory are interchanged.
Operation [m].3~[m].0 ↔ [m].7~[m].4
Affected flag(s) None
Swap nibbles of Data Memory with result in ACC
LSWAPA [m]
Description The low-order and high-order nibbles of the specified 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 flag(s) None
LSZ [m] Skip if Data Memory is 0
Description If the contents of the specified 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 three
cycle instruction. If the result is not 0 the program proceeds with the following instruction.
Operation Skip if [m]=0
Affected flag(s) None
LSZA [m] Skip if Data Memory is 0 with data movement to ACC
Description The contents of the specified 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 three cycle instruction. If the result is not 0 the
program proceeds with the following instruction.
Operation ACC ← [m]
Skip if [m]=0
Affected flag(s) None
Rev. 1.50
BC68F2130/BC68F2140/BC68F2150
Sub-1GHz RF Transmitter Flash MCU with OCDS
144 January, 22, 2021