Datasheet

Section 12 Serial Communication Interface
Rev.7.00 Dec. 24, 2008 Page 388 of 698
REJ09B0074-0700
1234567891011 123 45 67 8
12 13 14 15 16 17 18 19 20 21 2322 24 25 26 27 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 1 2 3 428 29
5.333 MHz
3.6848 MHz
123
123
4 5 6 7 8 9 101112131415161718192021 2322
4 5 6 7 8 9 10 11 12 13 14 15
16
24 25 26 27 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 1 2 3 428 29
2.667 MHz
1.8424 MHz
Base clock
10.667 MHz/2 = 5.333 MHz
5.333 MHz × (38/55)
= 3.6848 MHz
(Average)
1 bit = base clock × 8*
Base clock with 460.606-kbps average transfer rate (ACS3 to ACS0 = B'0010)
Average transfer rate = 3.6848 MHz/8 = 460.606 kbps Average error with 460.6 kbps = -0.043%
1 bit = Base clock × 16*
Base clock
10.667 MHz/4= 2.667 MHz
2.667 MHz × (38/55)
= 1.8424 MHz
(Average)
When φ = 10.667 MHz Base clock with 115.152-kbps average transfer rate (ACS3 to ACS0 = B'0001)
Average transfer rate = 1.8424 MHz/16 = 115.152 kbps Average error with 115.2 kbps = -0.043%
Note: * The lengh of one bit varies according to the base clock synchronization.
Figure 12.3 Examples of Base Clock when Average Transfer Rate Is Selected (1)