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STM32F051R6 Arkusz danych(PDF) 84 Page - STMicroelectronics

Numer części STM32F051R6
Szczegółowy opis  Low- and medium-density advanced ARM??based 32-bit MCU with 16 to 64 Kbytes Flash, timers, ADC, DAC and comm. interfaces
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Producent  STMICROELECTRONICS [STMicroelectronics]
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STM32F051R6 Arkusz danych(HTML) 84 Page - STMicroelectronics

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STM32F051x
Electrical characteristics
Doc ID 022265 Rev 3
85/105
tCOUNTER 16-bit counter clock period
1
65536
tTIMxCLK
fTIMxCLK = 48 MHz
0.0208
1365
µs
tMAX_COUNT
Maximum possible count
with 32-bit counter
-
65536 × 65536
tTIMxCLK
fTIMxCLK = 48 MHz
-
89.48
s
1.
TIMx is used as a general term to refer to the TIM1, TIM2, TIM3, TIM6, TIM14, TIM15, TIM16 and TIM17
timers.
Table 62.
IWDG min/max timeout period at 40 kHz (LSI) (1)
1.
These timings are given for a 40 kHz clock but the microcontroller’s internal RC frequency can vary from
30 to 60 kHz. Moreover, given an exact RC oscillator frequency, the exact timings still depend on the
phasing of the APB interface clock versus the LSI clock so that there is always a full RC period of
uncertainty.
Prescaler divider
PR[2:0] bits
Min timeout RL[11:0]=
0x000
Max timeout RL[11:0]=
0xFFF
Unit
/4
0
0.1
409.6
ms
/8
1
0.2
819.2
/16
2
0.4
1638.4
/32
3
0.8
3276.8
/64
4
1.6
6553.6
/128
5
3.2
13107.2
/256
6 or 7
6.4
26214.4
Table 63.
WWDG min-max timeout value @48 MHz (PCLK)
Prescaler
WDGTB
Min timeout value
Max timeout value
Unit
1
0
0.0853
5.4613
ms
2
1
0.1706
10.9226
4
2
0.3413
21.8453
8
3
0.6826
43.6906
Table 61.
TIMx(1) characteristics (continued)
Symbol
Parameter
Conditions
Min
Max
Unit



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