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ST10F280 bảng dữ liệu(PDF) 115 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  16-BIT MCU WITH MAC UNIT, 512K BYTE FLASH MEMORY AND 18K BYTE RAM
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ST10F280 bảng dữ liệu(HTML) 115 Page - STMicroelectronics

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Synchronous Mode Baud Rates
For
synchronous
operation,
the
Baud
rate
generator provides a clock with 4 times the rate of
the established Baud rate. The Baud rate for
synchronous operation of serial channel ASC0
can be determined by the following formula:
(S0BRL) represents the content of the reload
register, taken as unsigned 13 Bit integers,
(S0BRS) represents the value of Bit S0BRS (‘0’ or
‘1’), taken as integer.
Using the above equation, the maximum Baud
rate can be calculated for any clock speed as
given in Table 25.
Note: The deviation errors given in the Table 25 are rounded. To avoid deviation errors use a Baud rate
crystal (providing a multiple of the ASC0/SSC sampling frequency)
BSync =
S0BRL = (
fCPU
4 x [2 + (S0BRS)] x BSync
) 1
fCPU
4 x [2 + (S0BRS)] x [(S0BRL) + 1]
Table 25 : Commonly Used Baud Rates by Reload Value and Deviation Errors
S0BRS = ‘0’, fCPU = 40MHz
S0BRS = ‘1’, fCPU = 40MHz
Baud Rate (Baud)
Deviation Error
Reload Value
(hexa)
Baud Rate (Baud)
Deviation Error
Reload Value
(hexa)
5 000 000
0.0% / 0.0%
0000 / 0000
3 333 333
0.0% / 0.0%
0000 / 0000
112 000
+1.5% /0.8%
002B / 002C
112 000
+2.6% /0.8%
001C / 001D
56 000
+0.3% /0.8%
0058 / 0059
56 000
+0.9% /0.8%
003A / 003B
38 400
+0.2% /0.6%
0081 / 0082
38 400
+0.9% /0.2%
0055 / 0056
19 200
+0.2% /0.2%
0103 / 0104
19 200
+0.4% /0.2%
00AC / 00AD
9 600
+0.2% /0.0%
0207 / 0208
9 600
+0.1% /0.2%
015A / 015B
4 800
+0.1% /0.0%
0410 / 0411
4 800
+0.1% /0.1%
02B5 / 02B6
2 400
0.0% / 0.0%
0822 / 0823
2 400
+0.1% /0.0%
056B / 056C
1 200
0.0% / 0.0%
1045 / 1046
1 200
0.0% / 0.0%
0AD8 / 0AD9
900
0.0% / 0.0%
15B2 / 15B3
600
0.0% / 0.0%
15B2 / 15B3
612
0.0% / 0.0%
1FE8 / 1FE9
407
0.0% / 0.0%
1FFD / 1FFE



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