Serial channels
ST10F276E
Table 53. ASC asynchronous baud rates by reload value and deviation errors (fCPU = 64 MHz)
S0BRS = ‘0’, fCPU = 64 MHz S0BRS = ‘1’, fCPU = 64 MHz
Baud rate
(baud)
Reload value
Baud rate
(baud)
Reload value
Deviation error
Deviation error
(hex)
(hex)
2 000 000
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
600
0.0% / 0.0%
+1.5% / -7.0%
+1.5% / -3.0%
+1.7% / -1.4%
+0.2% / -1.4%
+0.2% / -0.6%
+0.2% / -0.2%
+0.2% / 0.0%
0.1% / 0.0%
0000 / 0000
0010 / 0011
0022 / 0023
0033 / 0034
0067 / 0068
00CF / 00D0
019F / 01A0
0340 / 0341
0681 / 0682
0D04 / 0D05
1A09 / 1A0A
1FE2 / 1FE3
1 333 333
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
600
0.0% / 0.0%
+6.3% / -7.0%
+6.3% / -0.8%
+3.3% / -1.4%
+0.9% / -1.4%
+0.9% / -0.2%
+0.4% / -0.2%
+0.1% / -0.2%
+0.1% / -0.1%
+0.1% / 0.0%
0.0% / 0.0%
0000 / 0000
000A / 000B
0016 / 0017
0021 / 0022
0044 / 0045
0089 / 008A
0114 / 0115
022A / 015B
0456 / 0457
08AD / 08AE
115B / 115C
1FF2 / 1FF3
0.0% / 0.0%
300
0.0% / 0.0%
0.0% / 0.0%
300
245
163
0.0% / 0.0%
Note:
The deviation errors given in the Table 52 and Table 53 are rounded. To avoid deviation
errors use a Baud rate crystal (providing a multiple of the ASC0 sampling frequency).
14.3
ASCx in synchronous mode
In synchronous mode, data is transmitted or received synchronously to a shift clock which is
generated by the ST10F276E. Half-duplex communication up to 8M baud (at 40 MHz of
fCPU) is possible in this mode.
Table 54. ASC synchronous baud rates by reload value and deviation errors (fCPU = 40 MHz)
S0BRS = ‘0’, fCPU = 40 MHz S0BRS = ‘1’, fCPU = 40 MHz
Baud rate
(baud)
Reload value
Baud rate
(baud)
Reload value
Deviation error
Deviation error
(hex)
(hex)
5 000 000
112 000
56 000
38 400
19 200
9 600
0.0% / 0.0%
+1.5% / -0.8%
+0.3% / -0.8%
+0.2% / -0.6%
+0.2% / -0.2%
+0.2% / 0.0%
+0.1% / 0.0%
0.0% / 0.0%
0000 / 0000
002B / 002C
0058 / 0059
0081 / 0082
0103 / 0104
0207 / 0208
0410 / 0411
0822 / 0823
1045 / 1046
3 333 333
112 000
56 000
38 400
19 200
9 600
0.0% / 0.0%
+2.6% / -0.8%
+0.9% / -0.8%
+0.9% / -0.2%
+0.4% / -0.2%
+0.1% / -0.2%
+0.1% / -0.1%
+0.1% / 0.0%
0.0% / 0.0%
0000 / 0000
001C / 001D
003A / 003B
0055 / 0056
00AC / 00AD
015A / 015B
02B5 / 02B6
056B / 056C
0AD8 / 0AD9
4 800
4 800
2 400
2 400
1 200
0.0% / 0.0%
1 200
96/235
Doc ID 12303 Rev 3
STMICROELECTRONICS [ ST ]
