STM32F303VC datasheet(95/133 Pages) STMICROELECTRONICS

部件名	STM32F303VC

功能描述	ARM Cortex-M4F 32b MCUFPU, up to 256KB Flash48KB SRAM

PDF	133 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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95 / 133 page

STM32F302xx/STM32F303xx

Electrical characteristics

Doc ID 023353 Rev 5

95/133

Table 57.

IWDG min/max timeout period at 40 kHz (LSI) (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 (ms) RL[11:0]=

0x000

Max timeout (ms) RL[11:0]=

0xFFF

0.1

409.6

0.2

819.2

/16

0.4

1638.4

/32

0.8

3276.8

/64

1.6

6553.6

/128

3.2

13107.2

/256

6.4

26214.4

Table 58.

WWDG min-max timeout value @72 MHz (PCLK)

Prescaler

WDGTB

Min timeout value

Max timeout value

0.05687 (1)

Guaranteed by design, not tested in production.

3.6409 (1)

0.1137 (1)

7.2817 (1)

0.2275 (1)

14.564 (1)

0.4551 (1)

29.127 (1)

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