Datasheet

Table Of Contents
Section 13 Serial Communication Interface
REJ09B0140-0900 Rev. 9.00 Page 421 of 846
Sep 16, 2010
H8S/2215 Group
Table 13.6 BRR Settings for Various Bit Rates (Clocked Synchronous Mode)
Operating Frequency φ (MHz)
2 4 6 8 10 16 20 24
Bit Rate
(bps)
n N n N n N n N n N n N n N n N
110 3 70
250 2 124 2 249 3 124 3 249
500 1 249 2 124 2 249 — — 3 124 — — —
1 k 1 124 1 249 2 124 — — 2 249 — — —
2.5 k 0 199 1 99 1 149 1 199 1 249 2 99 2 124 2 149
5 k 0 99 0 199 1 74 1 99 1 124 1 199 1 249 2 74
10 k 0 49 0 99 0 149 0 199 0 249 1 99 1 124 1 149
25 k 0 19 0 39 0 59 0 79 0 99 0 159 0 199 0 239
50 k 0 9 0 19 0 29 0 39 0 49 0 79 0 99 0 119
100 k 0 4 0 9 0 14 0 19 0 24 0 39 0 49 0 59
250 k 0 1 0 3 0 5 0 7 0 9 0 15 0 19 0 23
500 k 0 0
*
0 1 0 2 0 3 0 4 0 7 0 9 0 11
1 M 0 0
*
0 1 0 3 0 4 0 5
2 M 0 0
*
0 1 0 2
2.5 M 0 0
*
0 1
4 M 0 0
*
5 M 0 0
*
— —
6 M 0 0
*
Legend:
Blank: Cannot be set.
—: Can be set, but there will be a degree of error.
*: Continuous transfer is not possible.
Table 13.7 Maximum Bit Rate with External Clock Input (Clocked Synchronous Mode)
φ (MHz)
External Input
Clock (MHz)
Maximum Bit
Rate (Mbps)
φ (MHz)
External Input
Clock (MHz)
Maximum Bit
Rate (Mbps)
2 0.333 0.333 14 2.333 2.333
4 0.667 0.667 16 2.667 2.667
6 1.000 1.000 18 3.000 3.000
8 1.333 1.333 20 3.333 3.333
10 1.667 1.667 24 4.000 4.000
12 2.000 2.000
Note: In this LSI, operating frequency φ must be 13 MHz or greater.