Rev. 1.0, 02/00, page 408 of 1141
Bit 3
Multiprocessor Interrupt Enable (MPIE): Enables or disables multiprocessor interrupts.
The MPIE bit setting is only valid in asynchronous mode when receiving with the MP bit in
SMR1 set to 1.
The MPIE bit setting is invalid in clock synchronous mode or when the MP bit is cleared to 0.
Bit 3
MPIE
Description
0
Multiprocessor interrupts disabled (normal reception performed)
(Initial value)
[Clearing conditions]
1. When the MPIE bit is cleared to 0
2. When data with MPB = 1 is received
1
Multiprocessor interrupts enabled*
Receive interrupt (RXI) requests, receive-error interrupt (ERI) requests, and setting of
the RDRF, FER, and ORER flags in SSR1 are disabled until data with the
multiprocessor bit set to 1 is received.
Note:
*
When receive data including MPB = 0 is received, receive data transfer from RSR1 to
RDR1, receive error detection, and setting of the RDRF, FER, and ORER flags in SSR1
, is not performed. When receive data with MPB = 1 is received, the MPB bit in SSR1 is
set to 1, the MPIE bit is cleared to 0 automatically, and generation of RXI and ERI
interrupts (when the TIE and RIE bits in SCR are set to 1) and FER and ORER flag
setting is enabled.
Bit 2
Transmit End Interrupt Enable (TEIE): Enables or disables transmit-end interrupt
(TEI) request generation if there is no valid transmit data in TDR when the MSB is transmitted.
Bit 2
TEIE
Description
0
Transmit-end interrupt (TEI) request disabled*
(Initial value)
1
Transmit-end interrupt (TEI) request enabled*
Note:
*
TEI cancellation can be performed by reading 1 from the TDRE flag in SSR1, then
clearing it to 0 and clearing the TEND flag to 0, or clearing the TEIE bit to 0.