Peripheral migration guide

AN4658

18/24

DocID027496 Rev 1

2.13

USB OTG

The STM32F446xx and STM32F429xx/439xx implement similar USB peripherals, as shown

in Table 17, where a gray cell indicates a not available feature.

Table 17. USB comparison

USB

STM32F429xx/439xx

STM32F446xx

Features

Universal Serial Bus Revision 2.0

Full support for the USB On-The-Go (USB OTG)

USB internal connect/disconnect feature with an internal pull-up resistor on the USB D + (USB_DP) line

NA

FS mode

1 bidirectional control endpoint

3 IN endpoints (Bulk, Interrupt, Isochronous)

3 OUT endpoints (Bulk, Interrupt, Isochronous

1 bidirectional control endpoint

5 IN endpoints (Bulk, Interrupt, Isochronous)

5 OUT endpoints (Bulk, Interrupt, Isochronous)

HS mode

6 bidirectional endpoints (including EP0)

12 Host mode channels

Buffer

memory

FS mode

Management of up to 4 Tx FIFOs

(1 for each IN end point) + 1 Rx FIFO

Management of up to 6 Tx FIFOs

(1 for each IN end point) + 1 Rx FIFO

HS mode

4 KB total RAM

Low-

power

modes

FS mode

USB suspend and resume

USB suspend and resume

Link Power Management (LPM) support

HS mode

LPM not supported

LPM supported