HD643303x Hitachi, HD643303x Datasheet - Page 348

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

Table 11-4 Examples of Bit Rates and BRR Settings in Synchronous Mode
Bit Rate
(bits/s)
110
250
500
1 k
2.5 k
5 k
10 k
25 k
50 k
100 k
250 k
500 k
1 M
2 M
2.5 M
4 M
Note: Settings with an error of 1% or less are recommended.
Legend
Blank: No setting available
—:
*:
The BRR setting is calculated as follows:
Asynchronous mode:
N =
Synchronous mode:
N =
B: Bit rate (bits/s)
N: BRR setting for baud rate generator (0 ≤ N ≤ 255)
ø: System clock frequency (MHz)
n: Baud rate generator clock source (n = 0, 1, 2, 3)
(For the clock sources and values of n, see the table below.)
64
8
Continuous transmit/receive not possible
Setting possible, but error occurs
2
2
2n–1
2n–1
ø
ø
3
n
2
1
1
0
0
0
0
0
0
0
0
B
2
B
N
70
124
249
124
199
99
49
19
9
4
1
0*
10
10
6
6
n
—
2
2
1
1
0
0
0
0
0
0
0
0
– 1
– 1
4
N
—
249
124
249
99
199
99
39
19
9
3
1
0*
n
—
3
2
2
1
1
0
0
0
0
0
0
0
0
—
ø (MHz)
8
N
—
124
249
124
199
99
199
79
39
19
7
3
1
0*
—
333
n
—
—
—
—
1
1
0
0
0
0
0
0
—
—
0
10
N
—
—
—
—
249
124
249
99
49
24
9
4
—
—
0*
n
—
3
3
2
2
1
1
0
0
0
0
0
0
0
—
0
16
N
—
249
124
249
99
199
99
159
79
39
15
7
3
1
—
0*