JB - 8051

The JB instruction branches to the address specified in the second operand if the value of the bit specified in the first operand is 1. The bit that is tested is not modified. No flags are affected by this instruction.

Syntax

JB bit,offset		;3 bytes 2 cycles

Example

;JB
;PC = PC + 3
;IF (bit) = 1
;  PC = PC + offset

JB P1.2, Label

Output / Return Value

Limitations

Alternatives / See Also

Reference