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AN4660 bảng dữ liệu(PDF) 16 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Designers of STM32 microcontroller applications must have the possibility
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AN4660 bảng dữ liệu(HTML) 16 Page - STMicroelectronics

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Peripheral migration
AN4660
16/27
DocID027558 Rev 2
2.8.1
Maximum frequency according to power scale parameter
Table 13 shows the comparison of maximum frequency that the MCU can reach between
STM32F42xxx/F43xxx and STM32F74xxx/F75xxx.
RTC
– LSE clock
– LSI clock
– HSE clock divided by 32
IWDG
LSI
LSE
NA
Configurable LSE drive in RCC_BDCR
register: LSEDRV[1:0]:
– 00: Low drive
– 10: Medium low drive
– 01: Medium high drive
– 11: High drive
RCC dedicated clock
configuration register
– RCC_DCKCFGR
–RCC_DKCFGR1
–RCC_DKCFGR2
Table 12. RCC differences between STM32F42xxx/F43xxx and
STM32F74xxx/F75xxx (continued)
Peripherals
STM32F42xxx/F43xxx
STM32F74xxx/F75xxx
Clock sources
Table 13. Maximum frequency comparison between STM32F42xxx/F43xxx and
STM32F74xxx/F75xxx
Symbol
Parameter
Conditions
F4 max
Freq
F7 max
Freq
Unit
fHCLK
Internal AHB clock
frequency
Power scale 3 (Over-drive OFF)
120
144
MHz
Power scale 2
Over-drive OFF
144
168
Over-drive ON
168
180
Power scale 1
Over-drive OFF
168
180
Over-drive ON
180
216
fPCLK1
Internal APB1 clock
frequency
Over-drive OFF
42
45
Over-drive ON
45
54
fPCLK2
Internal APB2 clock
frequency
Over-drive OFF
84
90
Over-drive ON
90
108



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