MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 699

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

Specifications of MCBSTM32EXL

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

RM0008
26.4.3
26.5
Note:
The HNP program model is described in detail in
model.
SRP dual role device
The SRP capable bit in the global USB configuration register (SRPCAP bit in
OTG_FS_GUSBCFG) enables the OTG_FS Core to switch off the generation of V
the A-Device to save power. Note that the A-Device is always in charge of driving V
regardless of the host or peripheral role of the OTG_FS.
the SRP A/B-Device program model is described in detail in
programming
USB peripheral
This section gives the functional description of the OTG_FS in the USB peripheral mode.
The OTG_FS works as an USB peripheral in the following circumstances:
●
●
●
●
To build a bus-powered device implementation in case of the B-Device or Peripheral-only
configuration, an external regulator has to be added that generates the V
from V
OTG B-Peripheral
–
OTG A-Peripheral
–
B-Device
–
Peripheral only (see
–
BUS
OTG B-Device default state if B-side of USB cable is plugged in
OTG A-Device state after the HNP switches the OTG_FS to its peripheral role
If the ID line is present, functional and connected to the B-side of the USB cable,
and the HNP-capable bit in the Global USB Configuration register (HNPCAP bit in
OTG_FS_GUSBCFG) is cleared (see On-The-Go Rev1.3 par. 6.8.3).
The force device mode bit in the Global USB configuration register (FDMOD in
OTG_FS_GUSBCFG) is set to 1, forcing the OTG_FS core to work as a USB
peripheral-only (see On-The-Go Rev1.3 par. 6.8.3). In this case, the ID line is
ignored even if present on the USB connector.
.
model.
Figure 262: USB peripheral-only
Doc ID 13902 Rev 9
Section 26.15: OTG_FS programming
USB on-the-go full-speed (OTG_FS)
connection)
Section 26.15: OTG_FS
DD
chip-supply
BUS
BUS
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