3069RF-ZTAT Datasheet, PDF (496/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Bit 0—Multiprocessor Bit Transfer (MPBT): Stores the value of the multiprocessor bit added to
transmit data when a multiprocessor format in selected for transmitting in asynchronous mode.
The MPBT bit setting is ignored in synchronous mode, when a multiprocessor format is not
selected, or when the SCI cannot transmit.
Bit 1
MPBT
0
1
Description
Multiprocessor bit value in transmit data is 0
Multiprocessor bit value in transmit data is 1
(Initial value)
13.2.8 Bit Rate Register (BRR)
BRR is an 8-bit register that, together with the CKS1 and CKS0 bits in SMR that select the baud
rate generator clock source, determines the serial communication bit rate.
Bit
7
6
5
4
3
2
1
0
Initial value
Read/Write
1
R/W
1
R/W
1
R/W
1
1
1
R/W
R/W
R/W
1
1
R/W
R/W
The CPU can always read and write BRR. BRR is initialized to H'FF by a reset and in standby
mode. Each SCI channel has independent baud rate generator control, so different values can be
set in the three channels.
Table 13.3 shows examples of BRR settings in asynchronous mode. Table 13.4 shows examples
of BRR settings in synchronous mode.
Rev. 5.0, 09/04, page 474 of 978