h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 459

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 0—Multiprocessor Bit Transfer (MPBT): When transmission is performed using a
multiprocessor format in asynchronous mode, MPBT stores the multiprocessor bit to be added to
the transmit data.
The MPBT bit setting is invalid when a multiprocessor format is not used, when not transmitting,
and in synchronous mode.
15.2.8
BRR is an 8-bit register that sets the serial transfer bit rate in accordance with the baud rate
generator operating clock selected by bits CKS1 and CKS0 in SMR.
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, watch mode, subactive mode, subsleep
mode, and module stop mode.
As baud rate generator control is performed independently for each channel, different values can
be set for each channel.
Table 15.3 shows sample BRR settings in asynchronous mode, and table 15.4 shows sample BRR
settings in synchronous mode.
Bit 0
MPBT
0
1
Bit
Initial value
Read/Write
Bit Rate Register (BRR)
Description
Data with a 0 multiprocessor bit is transmitted
Data with a 1 multiprocessor bit is transmitted
R/W
7
1
R/W
6
1
R/W
5
1
Section 15 Serial Communication Interface (SCI, IrDA)
R/W
4
1
Rev. 4.00 Jun 06, 2006 page 405 of 1004
R/W
3
1
R/W
2
1
R/W
REJ09B0301-0400
1
1
(Initial value)
R/W
0
1