MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 700

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

USB on-the-go full-speed (OTG_FS)
26.5.1
26.5.2
700/995
Figure 262. USB peripheral-only connection
1. Use a regulator to build a bus-powered device.
2. V
SRP-capable peripheral
The SRP capable bit in the Global USB configuration register (SRPCAP bit in
OTG_FS_GUSBCFG) enables the OTG_FS to support the session request protocol (SRP).
In this way, it allows the remote A-Device to save power by switching off V
session is suspended.
The SRP peripheral mode program model is described in detail in the
request protocol
Peripheral states
Powered state
The V
to enter the powered state (see USB2.0 par9.1). The OTG_FS then automatically connects
the DP pull-up resistor to signal full-speed device connection to the host and generates the
session request interrupt (SRQINT bit in OTG_FS_GINTSTS) to notify the powered state.
The V
operations. If a drop in V
because of a power disturbance or if the host port has been switched off), the OTG_FS
automatically disconnects and the session end detected (SEDET bit in
OTG_FS_GOTGINT) interrupt is generated to notify that the OTG_FS has exited the
powered state.
In the powered state, the OTG_FS expects to receive some reset signaling from the host.
No other USB operation is possible. When a reset signaling is received the reset detected
interrupt (USBRST in OTG_FS_GINTSTS) is generated. When the reset signaling is
complete, the enumeration done interrupt (ENUMDNE bit in OTG_FS_GINTSTS) is
generated and the OTG_FS enters the Default state.
DD
BUS
BUS
range between 2 V and 3.6 V.
input detects the B-Session valid voltage by which the USB peripheral is allowed
input also ensures that valid V
OSC_IN
OSC_OUT
section.
STM32F105xx
STM32F107xx
BUS
below B-session valid happens to be detected (for instance
Doc ID 13902 Rev 9
PA11
PA12
PA9
V
DD
(2)
BUS
levels are supplied by the host during USB
5V to V
Volatge regulator
DD
(1)
B-device session
VBUS
BUS
V
DM
DP
SS
while the USB
ai17116
RM0008