HD643303x Hitachi, HD643303x Datasheet - Page 344
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
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Bit 1—Multiprocessor Bit (MPB): Stores the value of the multiprocessor bit in receive data
when a multiprocessor format is used in asynchronous mode. MPB is a read-only bit and cannot
be written.
Bit 1
MPB
0
1
Note: * If the RE bit is cleared to 0 when a multiprocessor format is selected, MPB retains its
Bit 0—Multiprocessor Bit Transfer (MPBT): Stores the value of the multiprocessor bit added to
transmit data when a multiprocessor format is selected for transmitting in asynchronous mode.
The MPBT setting is ignored in synchronous mode, when a multiprocessor format is not selected,
or when the SCI is not transmitting.
Bit 0
MPBT
0
1
11.2.8 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.
The CPU can always read and write BRR. BRR is initialized to H'FF by a reset and in standby
mode. The two SCI channels have independent baud rate generator control, so different values can
be set in the two channels.
Table 11-3 shows examples of BRR settings in asynchronous mode. Table 11-4 shows examples
of BRR settings in synchronous mode.
Bit
Initial value
Read/Write
previous value.
Description
Multiprocessor bit value in receive data is 0*
Multiprocessor bit value in receive data is 1
Multiprocessor bit value in transmit data is 0
Multiprocessor bit value in transmit data is 1
Description
R/W
7
1
R/W
6
1
R/W
5
1
329
R/W
4
1
R/W
3
1
R/W
2
1
R/W
1
1
(Initial value)
(Initial value)
R/W
0
1
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