Bitr Bit Reset - Samsung S3C80M4/F80M4 User Manual

INSTRUCTION SET
BITR
— Bit Reset
BITR dst.b
dst(b) ← 0
Operation:
The BITR instruction clears the specified bit within the destination without affecting any other bits
in the destination.
Flags: No flags are affected.
Format:
opc
NOTE: In the second byte of the instruction format, the destination address is four bits, the bit address 'b'
Given: R1 = 07H:
Example:
BITR
If the value of working register R1 is 07H (00000111B), the statement "BITR R1.1" clears bit one
of the destination register R1, leaving the value 05H (00000101B).
6-20
dst | b | 0
is three bits, and the LSB address value is one bit in length.
→
R1.1 R1 = 05H
Bytes Cycles Opcode
(Hex)
2 4
S3C80M4/F80M4
Addr Mode
dst
77 rb