Datasheet

Section 15 Serial Communication Interface (SCI)
Rev. 6.00 Mar. 18, 2010 Page 579 of 982
REJ09B0054-0600
Operating Frequency φ (MHz)
10 16
*
1
20
*
1
Bit Rate
(bps) n N n N n N
110
250 — — 3 249
500 — — 3 124 — —
1 k — — 2 249 — —
2.5 k 1 249 2 99 2 124
5 k 1 124 1 199 1 249
10 k 0 249 1 99 1 124
25 k 0 99 0 159 0 199
50 k 0 49 0 79 0 99
100 k 0 24 0 39 0 49
250 k 0 9 0 15 0 19
500 k 0 4 0 7 0 9
1 M 0 3 0 4
2.5 M 0 0
*
0 1
5 M 0 0*
Legend:
Blank: Cannot be set.
—: Can be set, but there will be a degree of error.
*: Continuous transfer is not possible.
Notes: 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.
Table 15.7 Maximum Bit Rate with External Clock Input (Clocked Synchronous Mode)
φ (MHz)
External Input
Clock (MHz)
Maximum Bit Rate
(bps) φ (MHz)
External Input
Clock (MHz)
Maximum Bit Rate
(bps)
2
*
2
0.3333 0.333 12 2.0000 2.000
4
*
2
0.6667 0.667 14
*
1
2.3333 2.333
6
*
2
1.0000 1.000 16
*
1
2.6667 3.667
8
*
2
1.3333 1.333 18
*
1
3.0000 3.000
10 1.6667 1.667 20
*
1
3.3333 3.333
Notes 1. Supported only by the H8S/2239 Group.
2. The H8S/2258 Group is out of operation.