Datasheet

Table Of Contents
Section 13 Serial Communication Interface
Page 420 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
Table 13.4 Maximum Bit Rate for Each Frequency (Asynchronous Mode)
Maximum Bit Rate
(kbps)
Maximum Bit Rate
(kbps)
φ (MHz) ABCS = 0 ABCS = 1 n N φ (MHz) ABCS = 0 ABCS = 1 n N
2 62.5 125.0 0 0 9.8304 307.2 614.4 0 0
2.097152 65.536 131.027 0 0 10 312.5 625.0 0 0
2.4576 76.8 153.6 0 0 12 375.0 750.0 0 0
3 93.75 187.5 0 0 12.288 384.0 768.0 0 0
3.6864 115.2 230.4 0 0 14 437.5 875.0 0 0
4 125.0 250.0 0 0 14.7456 460.8 921.6 0 0
4.9152 153.6 307.2 0 0 16 500.0 1000.0 0 0
5 156.25 312.5 0 0 17.2032 537.6 1075.2 0 0
6 187.5 375.0 0 0 18 562.5 1125.0 0 0
6.144 192.0 384.0 0 0 19.6608 614.4 1228.8 0 0
7.3728 230.4 460.8 0 0 20 625.0 1250.0 0 0
8 250.0 500.0 0 0 24 750.0 1500.0 0 0
Table 13.5 Maximum Bit Rate with External Clock Input (Asynchronous Mode)
Maximum Bit Rate
(kbps)
Maximum Bit Rate
(kbps)
φ (MHz)
External
Input
Clock
(MHz) ABCS = 0 ABCS = 1 φ (MHz)
External
Input
Clock
(MHz) ABCS = 0 ABCS = 1
2 0.5000 31.25 62.5 9.8304 2.4576 153.6 307.2
2.097152 0.5243 327.68 65.536 10 2.5000 156.25 312.5
2.4576 0.6144 38.4 76.8 12 3.0000 187.5 375.0
3 0.7500 46.875 93.75 12.288 3.0720 192.0 384.0
3.6864 0.9216 57.6 115.2 14 3.5000 218.75 437.0
4 1.0000 62.5 125.0 14.7456 3.6864 230.4 460.8
4.9152 1.2288 76.8 153.6 16 4.0000 250.0 500.0
5 1.2500 78.125 156.25 17.2032 4.3008 268.8 537.6
6 1.5000 93.75 187.5 18 4.5000 281.25 562.5
6.144 1.5360 96.0 192.0 19.6608 4.9152 307.2 614.4
7.3728 1.8432 115.2 230.4 20 5.0000 312.5 625.0
8 2.0000 125.0 250.0 24 6.0000 375.0 750.0
Note: In this LSI, operating frequency φ must be 13 MHz or greater.