Usb On-The-Go Full-Speed (Otg_Fs); Otg_Fs Introduction - ST STM32F101 series Reference Manual

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

28 USB on-the-go full-speed (OTG_FS)
Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
High-density devices are STM32F101xx and STM32F103xx microcontrollers where the
Flash memory density ranges between 256 and 512 Kbytes.
XL-density devices are STM32F101xx and STM32F103xx microcontrollers where the
Flash memory density ranges between 768 Kbytes and 1 Mbyte.
Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
This section applies only to STM32F105xx and STM32F107xx connectivity line devices.
28.1

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 the 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
821/1128
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)
DocID13902 Rev 15
in host mode.
BUS
RM0008