STM32F050G4U7 查看數據表（PDF） - STMicroelectronics

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STM32F050G4U7

Low- and medium-density advanced ARM™-based 32-bit MCU with up to 32 Kbytes Flash, timers, ADC and comm. interfaces

STMicroelectronics 

Electrical characteristics

STM32F050xx

Table 54. TIMx(1) characteristics (continued)

Symbol

Parameter

Conditions

Min

Max

Unit

1

tCOUNTER 16-bit counter clock period

fTIMxCLK = 48 MHz 0.0208

65536

1365

tTIMxCLK

µs

tMAX_COUNT

Maximum possible count

with 32-bit counter

fTIMxCLK = 48 MHz

-

-

65536 × 65536

89.48

tTIMxCLK

s

1. TIMx is used as a general term to refer to the TIM1, TIM2, TIM3, TIM6, TIM14, TIM15, TIM16 and TIM17

timers.

Table 55. IWDG min/max timeout period at 40 kHz (LSI) (1)

Prescaler divider PR[2:0] bits

Min timeout RL[11:0]=

0x000

Max timeout RL[11:0]=

0xFFF

Unit

/4

0

0.1

/8

1

0.2

/16

2

0.4

/32

3

0.8

/64

4

1.6

/128

5

3.2

/256

6 or 7

6.4

409.6

819.2

1638.4

3276.8

ms

6553.6

13107.2

26214.4

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.

Table 56. WWDG min-max timeout value @48 MHz (PCLK)

Prescaler

WDGTB

Min timeout value

Max timeout value

Unit

1

0

0.0853

5.4613

2

1

4

2

0.1706

0.3413

10.9226

ms

21.8453

8

3

0.6826

43.6906

76/97

Doc ID 023683 Rev 1

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