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ST STM32F405 User Manual

ST STM32F405
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Reset and clock control for STM32F405xx/07xx and STM32F415xx/17xx(RCC) RM0090
216/1749 RM0090 Rev 18
Figure 21. Clock tree
1. For full details about the internal and external clock source characteristics, refer to the Electrical characteristics section in
the device datasheet.
PLL
VCO
xN
/ P
/ Q
/ R
/ M
/1 to 5
PHY Ethernet
25 to 50 MHz
USB2.0 PHY
24 to 60 MHz
/2,20
MII_RMII_SEL in SYSCFG_PMC
AHB
PRESC
/ 1,2,..512
APBx
PRESC
/ 1,2,4,8,16
if (APBx presc = 1x1
else x2
LSE
ETH_MII_TX_CLK_MII
OTG_HS_ULPI_CK
PLLI2SCLK
FCLK Cortex
free-running clock
APBx
peripheral
clocks
APBx timer
clocks
48 MHz
clocks
USBHS
ULPI clock
Ethernet
PTP clock
MCO1
Peripheral
clock enable
/1 to 5
MCO2
ai16088d
ETH_MII_RX_
CLK_MII
OSC32_IN
OSC32_OUT
LSE OS C
32.768 kHz
LSI RC
32 kHz
to independent
watchdog
LSE
LSI
to RTC
RTCCLK
RTCS E L[1:0]
IWDGCLK
HS E O S C
4-26 MHz
OS C _IN
OSC _OUT
HS I R C
16 MHz
PLLCLK
HSI
HSI
HSE
SW
SYSCLK
168 MHz
max
HCLK
to AHB bus, core,
memory and DMA
168 MHz max.
to Cortex System
timer
/8
Clock
Enable
Peripheral
clock enable
PLL48CK
I2S clocks
Peripheral
clock enable
Peripheral
clock enable
MACRMIICLK
MACTXCLK
MACRXCLK
to Ethernet MAC
Peripheral
clock enable
Peripheral
clock enable
Watchdog
enable
RTC
enable
Peripheral
clock enable
Peripheral
clock enable
Peripheral
clock enable
/2to 31
PLLI2S
VCO
xN
/ P
/ Q
/ R
SYSCLK
Ext. clock
I2SSRC
HSE_RTC
HSE
I2S_CKIN

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ST STM32F405 Specifications

General IconGeneral
BrandST
ModelSTM32F405
CategoryComputer Hardware
LanguageEnglish

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