Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 2.00 Aug. 20, 2008 Page 448 of 1198
REJ09B0403-0200
Table 13.3 Examples of BRR Settings for Various Bit Rates (Asynchronous Mode)
Operating Frequency φ (MHz)
20 25 34
Bit Rate (bit/s) n N Error (%) n N Error (%) n N Error (%)
110 3 88 –0.25 3 110 –0.02 3 150 –0.05
150 3 64 0.16 3 80 –0.47 3 110 –0.29
300 2 129 0.16 2 162 0.15 2 220 0.16
600 2 64 0.16 2 80 –0.47 2 110 –0.29
1200 1 129 0.16 1 162 0.15 1 220 0.16
2400 1 64 0.16 1 80 –0.47 1 110 –0.29
4800 0 129 0.16 0 162 0.15 0 220 0.16
9600 0 64 0.16 0 80 –0.47 0 110 –0.29
19200 0 32 –1.36 0 40 –0.76 0 54 0.62
31250 0 19 0.00 0 24 0.00 0 33 0.00
38400 0 15 1.73 0 19 1.73 0 27 –1.18
Note: Make the settings so that the error does not exceed 1%.
Table 13.4 Maximum Bit Rate for Each Frequency (Asynchronous Mode)
φ (MHz) Maximum Bit Rate (bit/s) n N
20 625000 0 0
25 781250 0 0
34 1062500 0 0
Table 13.5 Maximum Bit Rate with External Clock Input (Asynchronous Mode)
φ (MHz) External Input Clock (MHz) Maximum Bit Rate (bit/s)
20 5.0000 312500
25 6.2500 390625
34 8.0000 531250