Hardware manual

Rev. 3.0, 09/98, page 199 of 361
Bit 1Multiprocessor Bit (MPB): Stores the value of the multiprocessor bit in data received in
a multiprocessor format in asynchronous communication mode. This bit is cleared to “0” in
synchronous mode, or when a multiprocessor format is not used. If the RE bit is cleared to “0”
when a multiprocessor format is used, the MPB bit retains its previous value.
MPB can be read but not written.
Bit 1
MPB Description
0 Multiprocessor bit = “0” in receive data. (Initial value)
1 Multiprocessor bit = “1” in receive data.
Bit 0Multiprocessor Bit Transfer (MPBT): Stores the value of the multiprocessor bit inserted
in transmit data when a multiprocessor format is used in asynchronous communication mode. The
MPBT bit has no effect in synchronous mode, or when a multiprocessor format is not used. It is
not used in receiving data.
Bit 0
MPBT Description
0 Multiprocessor bit = “0” in transmit data. (Initial value)
1 Multiprocessor bit = “1” in transmit data.