Usb On-The-Go Full-Speed (Otg_Fs); Otg_Fs Introduction - ST STM32F205 series Reference Manual

USB on-the-go full-speed (OTG_FS)

29 USB on-the-go full-speed (OTG_FS)
This section applies to the whole STM32F20x and STM32F21x family, unless otherwise
specified.
29.1

OTG_FS introduction

Portions Copyright (c) 2004, 2005 Synopsys, Inc. All rights reserved. Used with permission.
This section presents the architecture and the programming model of the OTG_FS
controller.
The following acronyms are used throughout this section:
FS
LS
MAC
OTG
PFC
PHY
USB
UTMI
References are made to the following documents:
• USB On-The-Go Supplement, Revision 1.3
•
Universal Serial Bus Revision 2.0 Specification
The OTG_FS is a dual-role device (DRD) controller that supports both device and host
functions and is fully compliant with the On-The-Go Supplement to the USB 2.0
Specification. It can also be configured as a host-only or device-only controller, fully
compliant with the USB 2.0 Specification. In host mode, the OTG_FS supports full-speed
(FS, 12 Mbits/s) and low-speed (LS, 1.5 Mbits/s) transfers whereas in device mode, it only
supports full-speed (FS, 12 Mbits/s) transfers. The OTG_FS supports both HNP and SRP.
The only external device required is a charge pump for V
958/1378
Full-speed
Low-speed
Media access controller
On-the-go
Packet FIFO controller
Physical layer
Universal serial bus
USB 2.0 transceiver macrocell interface (UTMI)
RM0033 Rev 8
in host mode.
BUS
RM0033