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STM32F405xx, STM32F407xx Application block diagrams

A.2 USB OTG high speed (HS) interface solutions

Figure 89. USB controller configured as peripheral, host, or dual-mode

and used in high speed mode

1. It is possible to use MCO1 or MCO2 to save a crystal. It is however not mandatory to clock the STM32F40x

with a 24 or 26 MHz crystal when using USB HS. The above figure only shows an example of a possible

connection.

2. The ID pin is required in dual role only.

STM32F4xx

BUS

(2)

USB

USB HS

OTG Ctrl

FS PHY

ULPI

High speed

OTG PHY

ULPI_CLK

ULPI_D[7:0]

ULPI_DIR

ULPI_STP

ULPI_NXT

not connected

connector

MCO1 or MCO2

24 or 26 MHz XT

(1)

PLL

XT1

MS19005V2