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SH7018 Datasheet(PDF) 230 Page - Renesas Technology Corp

Part # SH7018
Description  SuperH??RISC engine
PDF  431 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7018 Datasheet(HTML) 230 Page - Renesas Technology Corp

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12.2.8
Bit Rate Register (BRR1)
The bit rate register (BRR1) is an 8-bit register that, together with the baud rate generator clock
source selected by the CKS1 and CKS0 bits in the serial mode register (SMR1), determines the
serial transmit/receive bit rate.
The CPU can always read and write the BRR1. The BRR1 is initialized to H'FF by a power-on
reset.
Bit:
7
6
5
4
3
2
1
0
Initial value:
1
1
1
1
1
1
1
1
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 12.3 lists examples of BRR1 settings in the asynchronous mode. Table 12.4 lists examples
of BRR1 settings in the clock synchronous mode.
Table 12.3
Bit Rates and BRR1 Settings (Asynchronous Mode)
φφφφ (MHz)
Bit Rate
4
4.9152
6
(Bits/s)
n
N
Error (%)
n
N
Error (%)
n
N
Error (%)
110
2
70
0.03
2
86
0.31
2
106
–0.44
150
1
207
0.16
1
255
0.00
2
77
0.16
300
1
103
0.16
1
127
0.00
1
155
0.16
600
0
207
0.16
0
255
0.00
1
77
0.16
1200
0
103
0.16
0
127
0.00
0
155
0.16
2400
0
51
0.16
0
63
0.00
0
77
0.16
4800
0
25
0.16
0
31
0.00
0
38
0.16
9600
0
12
0.16
0
15
0.00
0
19
–2.34
14400
0
8
–3.55
0
10
–3.03
0
12
0.16
19200
0
6
–6.99
0
7
0.00
0
9
–2.34
28800
0
3
8.51
0
4
6.67
0
6
–6.99
31250
0
3
0.00
0
4
–1.70
0
5
0.00
38400
0
2
8.51
0
3
0.00
0
4
–2.34



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