Rev. 5.00, 12/03, page 443 of 1088
The BRR setting is found from the following formulas.
Asynchronous mode:
N =
φ
64
×
2
2n–1
×
B
×
10
6
– 1
Synchronous mode:
N =
φ
8
×
2
2n–1
×
B
×
10
6
– 1
Where B: Bit rate (bits/s)
N: BRR setting for baud rate generator (0
≤
N
≤
255)
φ
: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
(See the table below for the relation between n and the clock.)
SMR Setting
n
Clock
CKS1
CKS0
0
φ
0
0
1
φ
/4
0
1
2
φ
/16
1
0
3
φ
/64
1
1
The bit rate error in asynchronous mode is found from the following formula:
Error (%) = {
φ ×
10
6
(N + 1)
×
B
×
64
×
2
2n–1
– 1
} ×
100
Содержание H8S/2318 series
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