STM32F302RBT7TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F302RBT7TR

ARM Cortex-M4F 32b MCU+FPU, up to 256KB Flash+48KB SRAM 4 ADCs, 2 DAC ch., 7 comp, 4 PGA, timers, 2.0-3.6 V operation

STMicroelectronics 

STM32F302xx/STM32F303xx

Electrical characteristics

Table 57. IWDG min/max timeout period at 40 kHz (LSI) (1)

Prescaler divider PR[2:0] bits

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

0x000

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

0xFFF

/4

0

0.1

/8

1

0.2

409.6

819.2

/16

2

0.4

/32

3

0.8

/64

4

1.6

/128

5

3.2

/256

7

6.4

1638.4

3276.8

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

Prescaler

WDGTB

Min timeout value

1

0

2

1

4

2

8

3

0.05687 (1)

0.1137 (1)

0.2275 (1)

0.4551 (1)

1. Guaranteed by design, not tested in production.

Max timeout value

3.6409 (1)

7.2817 (1)

14.564 (1)

29.127 (1)

Doc ID 023353 Rev 5

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