LCD Type MCU
RRC [m]
Description
Operation
Rotate Data Memory right through Carry
The contents of the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0
replaces the Carry bit and the original carry flag is rotated into bit 7.
[m].i
¬
[m].(i+1); (i = 0~6)
[m].7
¬
C
C
¬
[m].0
C
Rotate Data Memory right through Carry with result in ACC
Data in the specified Data Memory and the carry flag are rotated right by 1 bit. Bit 0 re-
places the Carry bit and the original carry flag is rotated into bit 7. The rotated result is
stored in the Accumulator and the contents of the Data Memory remain unchanged.
ACC.i
¬
[m].(i+1); (i = 0~6)
ACC.7
¬
C
C
¬
[m].0
C
Subtract Data Memory from ACC with Carry
The contents of the specified Data Memory and the complement of the carry flag are
subtracted from 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 pos-
itive or zero, the C flag will be set to 1.
ACC
¬
ACC
-
[m]
-
C
OV, Z, AC, C
Subtract Data Memory from ACC with Carry and result in Data Memory
The contents of the specified Data Memory and the complement of the carry flag are sub-
tracted from the Accumulator. The result is stored in the Data Memory. Note that if the re-
sult 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.
[m]
¬
ACC
-
[m]
-
C
OV, Z, AC, C
Skip if decrement Data Memory is 0
The contents of the specified Data Memory are first 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.
[m]
¬
[m]
-
1
Skip if [m] = 0
None
Affected flag(s)
RRCA [m]
Description
Operation
Affected flag(s)
SBC A,[m]
Description
Operation
Affected flag(s)
SBCM A,[m]
Description
Operation
Affected flag(s)
SDZ [m]
Description
Operation
Affected flag(s)
132
Home Index Bookmark Pages Text
Previous Next
Pages: Home Index