ST10F272B Datasheet, PDF (72/181 Pages) STMicroelectronics – 16-bit MCU with 256 Kbyte Flash memory and 12/20 Kbyte RAM

Serial channels
ST10F272B/ST10F272E
Table 41.
ASC asynchronous baud rates by reload value and deviation errors (f_CPU = 64 MHz)
S0BRS = ‘0’, f_CPU = 64 MHz
S0BRS = ‘1’, f_CPU = 64 MHz
Baud Rate (Baud) Deviation Error
Reload Value
(hex)
Baud Rate (Baud) Deviation Error
Reload Value
(hex)
2 000 000
112 000
0.0% / 0.0%
+1.5% / -7.0%
0000 / 0000
0010 / 0011
1 333 333
112 000
0.0% / 0.0%
+6.3% / -7.0%
0000 / 0000
000A / 000B
56 000
38 400
19 200
9 600
4 800
+1.5% / -3.0%
+1.7% / -1.4%
+0.2% / -1.4%
+0.2% / -0.6%
+0.2% / -0.2%
0022 / 0023
0033 / 0034
0067 / 0068
00CF / 00D0
019F / 01A0
56 000
38 400
19 200
9 600
4 800
+6.3% / -0.8%
+3.3% / -1.4%
+0.9% / -1.4%
+0.9% / -0.2%
+0.4% / -0.2%
0016 / 0017
0021 / 0022
0044 / 0045
0089 / 008A
0114 / 0115
2 400
1 200
600
300
+0.2% / 0.0%
0.1% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0340 / 0341
0681 / 0682
0D04 / 0D05
1A09 / 1A0A
2 400
1 200
600
300
+0.1% / -0.2%
+0.1% / -0.1%
+0.1% / 0.0%
0.0% / 0.0%
022A / 015B
0456 / 0457
08AD / 08AE
115B / 115C
245
0.0% / 0.0%
1FE2 / 1FE3
163
0.0% / 0.0%
1FF2 / 1FF3
Note:
The deviation errors given in the Table 40 and Table 41 are rounded. To avoid deviation
errors use a Baud rate crystal (providing a multiple of the ASC0 sampling frequency).
15.3
ASCx in synchronous mode
In synchronous mode, data is transmitted or received synchronously to a shift clock which is
generated by the ST10F272. Half-duplex communication up to 8M Baud (at 40 MHz of f_CPU)
is possible in this mode.
Table 42. ASC synchronous baud rates by reload value and deviation errors (f_CPU = 40 MHz)
S0BRS = ‘0’, f_CPU = 40 MHz
S0BRS = ‘1’, f_CPU = 40 MHz
Reload Value
Reload Value
Baud Rate (Baud) Deviation Error
Baud Rate (Baud) Deviation Error
(hex)
(hex)
5 000 000
112 000
0.0% / 0.0%
+1.5% / -0.8%
0000 / 0000
002B / 002C
3 333 333
112 000
0.0% / 0.0%
+2.6% / -0.8%
0000 / 0000
001C / 001D
56 000
38 400
19 200
9 600
+0.3% / -0.8%
+0.2% / -0.6%
+0.2% / -0.2%
+0.2% / 0.0%
0058 / 0059
0081 / 0082
0103 / 0104
0207 / 0208
56 000
38 400
19 200
9 600
+0.9% / -0.8%
+0.9% / -0.2%
+0.4% / -0.2%
+0.1% / -0.2%
003A / 003B
0055 / 0056
00AC / 00AD
015A / 015B
4 800
2 400
1 200
+0.1% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0410 / 0411
0822 / 0823
1045 / 1046
4 800
2 400
1 200
+0.1% / -0.1%
+0.1% / 0.0%
0.0% / 0.0%
02B5 / 02B6
056B / 056C
0AD8 / 0AD9
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