STM32F107VC datasheet(96/103 Pages) STMICROELECTRONICS

96 / 103 page

Application block diagrams

STM32F105xx, STM32F107xx

96/104

Doc ID 15274 Rev 6

A.4

USB OTG FS interface + Ethernet/I2S interface solutions

With the clock tree implemented on the STM32F107xx, only one crystal is required to work

with both the USB (host/device/OTG) and the Ethernet (MII/RMII) interfaces. Figure 55

illustrate the solution.

Figure 55.

USB OTG FS + Ethernet solution

With the clock tree implemented on the STM32F107xx, only one crystal is required to work

with both the USB (host/device/OTG) and the I2S (Audio) interfaces. Figure 56 illustrate the

solution.

Figure 56.

USB OTG FS + I2S (Audio) solution

STM32F107 MCU

PLL2MUL

PLLMUL

PLL3MUL

x10

Ethernet

PHY

I2S

Sel

25 MHz

XTAL

Div

by 5

MCO

SYSCLK

Up to 72 MHz

PLLVCO

(2 xPLLCLK

USB

PHY

OTG

48 MHz

Div

by 3

Div

by 5

Up to 50 MHz

2% accuracy

STM32F105 /STM32F107MCU

PLL2MUL

PLLMUL

x6.5

PLL3MUL

x20

Ethernet

PHY

I2S

Sel

14.7456 MHz

XTAL

Div

by 4

MCO

SYSCLK

Up to 71.88 MHz

PLLVCO

(2 xPLLCLK

USB

PHY

OTG

47.9232 MHz

Div

by 3

Div

by 4

Up to 147.456 MHz

Less than 0.5% accuracy

0.16% accuracy

MCLK

SCLK

on MCLK and SCLK

PLL3VCO

(2 xPLL3CLK

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