Renesas H8S/2100 Series Hardware Manual page 406

Section 14 Serial Communication Interface (SCI)
Table 14.5 Maximum Bit Rate with External Clock Input (Asynchronous Mode)
External Input
φ (MHz)
Clock (MHz)
8 2.0000
9.8304 2.4576
10 2.5000
12 3.0000
12.288 3.0720
14 3.5000
Rev. 1.00 May 09, 2008 Page 380 of 954
REJ09B0462-0100
Maximum Bit
φ (MHz)
Rate (bit/s)
125000 14.7456
153600 16
156250 17.2032
187500 18
192000 19.6608
218750 20
25
External Input Maximum Bit
Clock (MHz) Rate (bit/s)
3.6864 230400
4.0000 250000
4.3008 268800
4.5000 281250
4.9152 307200
5.0000 312500
6.2500 390625