hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 283
hd66100
Manufacturer Part Number
hd66100
Description
H8/3867 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66100.pdf
(495 pages)
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10.2.8
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, module standby, or watch mode.
Table 10.3 shows examples of BRR settings in asynchronous mode. The values shown are for
active (high-speed) mode.
Table 10.3 Examples of BRR Settings for Various Bit Rates (Asynchronous Mode) (1)
B Bit Rate
(bit/s)
110
150
200
250
300
600
1200
2400
4800
9600
19200
31250
38400
268
Bit
Initial value
Read/Write
Bit rate register (BRR)
n
Cannot be used, —
as error
exceeds 3%
32.8 kHz
N
BRR7
R/W
7
1
Error
(%)
BRR6
n
0
0
—
0
0
—
—
—
—
—
—
—
R/W
6
1
38.4 kHz
N
—
3
2
—
1
0
—
—
—
—
—
—
—
BRR5
R/W
Error
(%)
—
0
0
—
0
0
—
—
—
—
—
—
—
5
1
n
—
2
0
0
0
0
0
0
—
—
—
—
—
BRR4
R/W
4
1
2 MHz
N
—
12
155 0.16
124 0
103 0.16
51
25
12
—
—
—
—
—
OSC
Error
(%)
—
0.16
0.16
0.16
0.16
—
—
—
—
—
BRR3
R/W
3
1
n
2
3
3
0
3
3
2
2
0
0
0
—
0
2.4576 MHz
BRR2
R/W
N
21
3
2
153 –0.26 0
1
0
1
0
7
3
1
—
0
2
1
Error
(%)
–0.83 —
0
0
0
0
0
0
0
0
0
—
0
BRR1
R/W
1
1
n
2
—
2
0
0
0
0
—
—
0
—
4 MHz
N
—
25
—
249 0
12
103 0.16
51
25
12
—
—
1
—
BRR0
R/W
0
1
Error
(%)
—
0.16
—
0.16
0.16
0.16
0.16
—
—
0
—
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