Advertisement
The BRR setting is found from the following formulas.
Asynchronous mode:
N =
64 × 2
Clocked synchronous mode:
N =
8 × 2
Where B: Bit rate (bit/s)
N: BRR setting for baud rate generator (0 ≤ N ≤ 255)
ø: 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.)
n
Clock
0
ø
1
ø/4
2
ø/16
3
ø/64
The bit rate error in asynchronous mode is found from the following formula:
Error (%) = {
ø
× 10
6
– 1
× B
2n–1
ø
× 10
6
– 1
× B
2n–1
SMR Setting
CKS1
0
0
1
1
ø × 10
6
(N + 1) × B × 64 × 2
CKS0
0
1
0
1
– 1} × 100
2n–1
607
Advertisement
