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STM32F030x4 bảng dữ liệu(PDF) 68 Page - STMicroelectronics

tên linh kiện STM32F030x4
Giải thích chi tiết về linh kiện  Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32F030x4 bảng dữ liệu(HTML) 68 Page - STMicroelectronics

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DocID024849 Rev 1
Table 53. 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 54. 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



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