Syntax: OWWRBIT Pin, BitVal

Function
Writes one bit to a 1-Wire bus.

• Pin  is any SX IO pin (RA.0 .. RA.7, RB.0 .. RB.7, RC.0 .. RC.7, RD.0 .. RD.7, RE.0 .. RE.7).
• BitVal  is a variable or constant value (0 to 1) that will be written to the 1-Wire bus.

Quick Facts

Explanation
After reset, 1-Wire transactions require writing values to the bus. While this is typically handled with OWWRBYTE, SX/B supports bit access with the OWWRBIT instruction. A bit is written by generating a timed low pulse on the DQ line; this is called a "Write Slot." The diagrams and tables below details the Write Slot sequences generated by the SX with OWWRBIT.

WRITE 0

WRITE 1

Related instructions: OWRESET, OWRDBIT, OWRDBYTE, and OWWRBYTE

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