Renesas RX Series

R01UH0823EJ0100 Rev.1.00 Page 990 of 1823
Jul 31, 2019
RX23W Group 33. Serial Communications Interface (SCIg, SCIh)
Note: This is an example when the ABCS and BGDM bits in SEMR are 0.
When either the ABCS bit or BGDM bit is set to 1, the bit rate doubles.
When both ABCS and BGDM bits in SEMR are set to 1, the bit rate increases four times.
Table 33.14 Examples of BRR Settings for Various Bit Rates (Asynchronous Mode)
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
8 9.8304 10 12 12.288
n N Error (%) n N Error (%) n N Error (%) n N Error (%) n N Error (%)
110 2 141 0.03 2 174 –0.26 2 177 –0.25 2 212 0.03 2 217 0.08
150 2 103 0.16 2 127 0.00 2 129 0.16 2 155 0.16 2 159 0.00
300 1 207 0.16 1 255 0.00 2 64 0.16 2 77 0.16 2 79 0.00
600 1 103 0.16 1 127 0.00 1 129 0.16 1 155 0.16 1 159 0.00
1200 0 207 0.16 0 255 0.00 1 64 0.16 1 77 0.16 1 79 0.00
2400 0 103 0.16 0 127 0.00 0 129 0.16 0 155 0.16 0 159 0.00
4800 0 51 0.16 0 63 0.00 0 64 0.16 0 77 0.16 0 79 0.00
9600 0 25 0.16 0 31 0.00 0 32 –1.36 0 38 0.16 0 39 0.00
19200 0 12 0.16 0 15 0.00 0 15 1.73 0 19 –2.34 0 19 0.00
31250 0 7 0.00 0 9 –1.70 0 9 0.00 0 11 0.00 0 11 2.40
38400 — — — 0 7 0.00 0 7 1.73 0 9 –2.34 0 9 0.00
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
14 16 17.2032 18 19.6608
n N Error (%) n N Error (%) n N Error (%) n N Error (%) n N Error (%)
110 2 248 –0.17 3 70 0.03 3 75 0.48 3 79 –0.12 3 86 0.31
150 2 181 0.16 2 207 0.16 2 223 0.00 2 233 0.16 2 255 0.00
300 2 90 0.16 2 103 0.16 2 111 0.00 2 116 0.16 2 127 0.00
600 1 181 0.16 1 207 0.16 1 223 0.00 1 233 0.16 1 255 0.00
1200 1 90 0.16 1 103 0.16 1 111 0.00 1 116 0.16 1 127 0.00
2400 0 181 0.16 0 207 0.16 0 223 0.00 0 233 0.16 0 255 0.00
4800 0 90 0.16 0 103 0.16 0 111 0.00 0 116 0.16 0 127 0.00
9600 0 45 –0.93 0 51 0.16 0 55 0.00 0 58 –0.69 0 63 0.00
19200 0 22 –0.93 0 25 0.16 0 27 0.00 0 28 1.02 0 31 0.00
31250 0 13 0.00 0 15 0.00 0 16 1.20 0 17 0.00 0 19 –1.70
38400 — — — 0 12 0.16 0 13 0.00 0 14 –2.34 0 15 0.00
Bit Rate
(bps)
Operating Frequency PCLK (MHz)
20 25 30
n N Error (%) n N Error (%) n N Error (%)
110 3 88 –0.25 3 110 –0.02 3 132 0.13
150 3 64 0.16 3 80 0.47 3 97 –0.35
300 2 129 0.16 2 162 –0.15 2 194 0.16
600 2 64 0.16 2 80 0.47 2 97 –0.35
1200 1 129 0.16 1 162 –0.15 1 194 0.16
2400 1 64 0.16 1 80 0.47 1 97 –0.35
4800 0 129 0.16 0 162 –0.15 0 194 0.16
9600 0 64 0.16 0 80 0.47 0 97 –0.35
19200 0 32 –1.36 0 40 –0.76 0 48 –0.35
31250 0 19 0.00 0 24 0.00 0 29 0.00
38400 0 15 1.73 0 19 1.73 0 23 1.73