ST STM32F40 Series User Manual

USB on-the-go high-speed (OTG_HS) RM0090
1265/1422 Doc ID 018909 Rev 4
Figure 385. Transmit FIFO write task
1 MPS
or LPS FIFO space
available?
Wait for
Write 1 packet
data to
Transmit FIFO
More packets
to send?
Yes
No
No
Read GNPTXSTS/
HPTXFSIZ registers for
available FIFO and
queue spaces
Yes
MPS: Maximum packet size
LPS: Last packet sizetacet
Start
Done
ai15673
TXFELVL or PTXFELVL
interrupt in
OTG_FS_GAHBCFG

ST STM32F40 Series Specifications

General

Brand	ST
Model	STM32F40 Series
Category	Microcontrollers
Language	English