ST STM32F410 User Manual

RM0401 Rev 3 647/771
RM0401 Universal synchronous receiver transmitter (USART) /universal asynchronous receiver
679
Table 113. 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
programmed
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% 230.769 KBps 16.2500 0.16%
7 460.8 KBps 461.538 KBps 4.0625 0.16% 461.538 KBps 8.1250 0.16%
8 896 KBps 909.091 KBps 2.0625 1.46% 895.522 KBps 4.1875 0.05%
9 921.6 KBps 909.091 KBps 2.0625 1.36% 923.077 KBps 4.0625 0.16%
10 1.792 MBps 1.1764 MBps 1.0625 1.52% 1.8182 MBps 2.0625 1.36%
11 1.8432 MBps 1.8750 MBps 1.0000 1.73% 1.8182 MBps 2.0625 1.52%
12 3.584 MBps NA NA NA 3.2594 MBps 1.0625 1.52%
13 3.6864 MBps NA NA NA 3.7500 MBps 1.0000 1.73%
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.
2. Only USART1 and USART6 are clocked with PCLK2. Other USARTs are clocked with PCLK1. Refer to the device
datasheets for the maximum values for PCLK1 and PCLK2.
Table 114. Error calculation for programmed baud rates at f
PCLK
= 30 MHz or f
PCLK
= 60 MHz,
oversampling by 8
(1) (2)
Oversampling by 8 (OVER8=1)
Baud rate f
PCLK
= 30 MHz f
PCLK
=60 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
1 2.4 KBps 2.400 KBps 1562.5000 0.00% 2.400 KBps 3125.0000 0.00%
2 9.6 KBps 9.600 KBps 390.6250 0.00% 9.600 KBps 781.2500 0.00%
3 19.2 KBps 19.194 KBps 195.3750 0.03% 19.200 KBps 390.6250 0.00%
4 57.6 KBps 57.582 KBps 65.1250 0.16% 57.582 KBps 130.2500 0.03%
5 115.2 KBps 115.385 KBps 32.5000 0.16% 115.163 KBps 65.1250 0.03%
6 230.4 KBps 230.769 KBps 16.2500 0.16% 230.769 KBps 32.5000 0.16%

ST STM32F410 Specifications

General

Brand	ST
Model	STM32F410
Category	Microcontrollers
Language	English