MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 806

• 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)
806/995
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Isochronous OUT transactions
A typical isochronous OUT operation in Slave mode is shown in
assumptions are:
–
–
–
The sequence of operations is as follows:
a)
b)
c)
d)
e)
f)
g)
The application is attempting to send one packet every frame (up to 1 maximum
packet size), starting with an odd frame. (transfer size = 1 024 bytes).
The periodic transmit FIFO can hold one packet (1 KB).
Periodic request queue depth = 4.
Initialize and enable channel 1. The application must set the ODDFRM bit in
OTG_FS_HCCHAR1.
Write the first packet for channel 1. For a high-bandwidth isochronous transfer, the
application must write the subsequent packets up to MCNT (maximum number of
packets to be transmitted in the next frame times before switching to another
channel.
Along with the last DWORD write of each packet, the OTG_FS host writes an entry
to the periodic request queue.
The OTG_FS host attempts to send the OUT token in the next frame (odd).
The OTG_FS host generates the XFRC interrupt as soon as the last packet is
transmitted successfully.
In response to the XFRC interrupt, reinitialize the channel for the next transfer.
Handling non-ACK responses
Doc ID 13902 Rev 9
Figure
275. The
RM0008