STMicroelectronics STM32F407 User Manual

DocID018909 Rev 11 977/1731
RM0090 Universal synchronous asynchronous receiver transmitter (USART)
1010
4. 57.6 KBps 57.557 KBps 17.375 0.08% 57.554 KBps 34.750 0.08%
5. 115.2 KBps 115.942 KBps 8.625 0.64% 115.108 KBps 17.375 0.08%
6. 230.4 KBps 228.571 KBps 4.375 0.79% 231.884 KBps 8.625 0.64%
7. 460.8 KBps 470.588 KBps 2.125 2.12% 457.143 KBps 4.375 0.79%
8. 896 KBps 888.889 KBps 1.125 0.79% 888.889 KBps 2.250 0.79%
9. 921.6 KBps 888.889 KBps 1.125 3.55% 941.176 KBps 2.125 2.12%
10. 1.792 MBps NA NA NA 1.7777 MBps 1.125 0.79%
11. 1.8432 MBps NA NA NA 1.7777 MBps 1.125 3.55%
12. 3.584 MBps NA NA NA NA NA NA
13. 3.6864 MBps NA NA NA NA NA NA
14. 7.168 MBps NA NA NA NA NA NA
15. 7.3728 MBps NA NA NA NA NA NA
1. The lower the CPU clock the lower the accuracy for a particular baud rate. The upper limit of the achievable baud rate can
be fixed with these data.
Table 138. Error calculation for programmed baud rates at f
PCLK
= 8 MHz or f
PCLK
= 16 MHz,
oversampling by 8
(1)
(continued)
Oversampling by 8 (OVER8=1)
Baud rate f
PCLK
= 8 MHz f
PCLK
= 16 MHz
S.No Desired Actual
Value
programmed
in the baud
rate register
% Error =
(Calculated -
Desired)B.Rate
/Desired B.Rate
Actual
Value
programmed
in the baud
rate register
%
Error
Table 139. Error calculation for programmed baud rates at f
PCLK
= 30 MHz or f
PCLK
= 60 MHz,
oversampling by 16
(1)(2)
Oversampling by 16 (OVER8=0)
Baud rate f
PCLK
= 30 MHz f
PCLK
= 60 MHz
S.No Desired Actual
Value
programme
d in the
baud rate
register
% Error =
(Calculated -
Desired)B.Rate
/Desired B.Rate
Actual
Value
programmed
in the baud
rate register
%
Error
1. 2.4 KBps 2.400 KBps 781.2500 0.00% 2.400 KBps 1562.5000 0.00%
2. 9.6 KBps 9.600 KBps 195.3125 0.00% 9.600 KBps 390.6250 0.00%
3. 19.2 KBps 19.194 KBps 97.6875 0.03% 19.200 KBps 195.3125 0.00%
4. 57.6 KBps 57.582KBps 32.5625 0.03% 57.582 KBps 65.1250 0.03%
5. 115.2 KBps 115.385 KBps 16.2500 0.16% 115.163 KBps 32.5625 0.03%
6. 230.4 KBps 230.769 KBps 8.1250 0.16% 230.769KBps 16.2500 0.16%
7. 460.8 KBps 461.538 KBps 4.0625 0.16% 461.538 KBps 8.1250 0.16%

STMicroelectronics STM32F407 Specifications

General

Brand	STMicroelectronics
Model	STM32F407
Category	Controller
Language	English