260
Bit 1—Multiprocessor Bit Receive (MPBR): Bit 1 stores the multiprocessor bit in a receive
character during multiprocessor format reception in asynchronous mode.
Bit 1 is a read-only bit and cannot be modified.
Bit 1: MPBR
Description
0
Data in which the multiprocessor bit is 0 has been received
*
(Initial value)
1
Data in which the multiprocessor bit is 1 has been received
Note:
*
When bit RE is cleared to 0 in SCR3 with the multiprocessor format, bit MPBR is not
affected and retains its previous state.
Bit 0—Multiprocessor Bit Transfer (MPBT): Bit 0 stores the multiprocessor bit added to
transmit data when transmitting in asynchronous mode. The bit MPBT setting is invalid when
synchronous mode is selected, when the multiprocessor communication function is disabled, and
when not transmitting.
Bit 0: MPBT
Description
0
Multiprocessor bit value in transmit data is 0
(Initial value)
1
Multiprocessor bit value in transmit data is 1
14.2.8
Bit Rate Register (BRR)
Bit
7
6
5
4
3
2
1
0
BRR7
BRR6
BRR5
BRR4
BRR3
BRR2
BRR1
BRR0
Initial value
1
1
1
1
1
1
1
1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BRR is an 8-bit register that designates the transmit/receive bit rate in accordance with the baud
rate generator operating clock selected by bits CKS1 and CKS0 of the serial mode register (SMR).
BRR can be read or written by the CPU at any time.
BRR is initialized to H'FF upon reset, and in standby, subactive, or subsleep mode.
Table 14.3 shows examples of BRR settings in asynchronous mode. The values shown are for
active (high-speed) mode.
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