HD6413008VF25 Datasheet, PDF (388/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

12. Serial Communication Interface
Bit 1—Multiprocessor bit (MPB): Stores the value of the multiprocessor bit in the receive data
when a multiprocessor format is used in asynchronous mode. MPB is a read-only bit, and cannot
be written.
Bit 1
MPB
Description
0
Multiprocessor bit value in receive data is 0*
(Initial value)
1
Multiprocessor bit value in receive data is 1
Note: * If the RE bit in SCR is cleared to 0 when a multiprocessor format is selected, MPB
retains its previous value.
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 0
MPBT
0
1
Description
Multiprocessor bit value in transmit data is 0
Multiprocessor bit value in transmit data is 1
(Initial value)
12.2.8 Bit Rate Register (BRR)
BRR is an 8-bit register that sets the serial transmit/receive bit rate in accordance with the baud
rate generator operating clock selected by bits CKS0 and CKS1 in SMR.
Bit
7
6
5
4
3
2
1
0
Initial value
1
Read/Write
R/W
1
1
R/W
R/W
1
1
1
R/W
R/W
R/W
1
1
R/W
R/W
BRR can be read or written to by the CPU at all times.
BRR is initialized to H'FF by a reset and in standby mode.
As baud rate generator control is performed independently for each channel, different values can
be set for each channel.
Rev.4.00 Aug. 20, 2007 Page 342 of 638
REJ09B0395-0400