TH6503 Datasheet, PDF (19/24 Pages) List of Unclassifed Manufacturers – USB Low-Speed Interface

TH6503 USB Low-Speed Interface
Flowchart for
Programming the
TH6503
(continued)
Write next Device Data to TH6503
If IN FIFO data has to be sent to the USB host the microcontroller must wait until the corresponding IN
DONE bit is set (IN FIFO is empty). Then the microcontroller can store the next data in the IN FIFO.
Write Adr/CntInRegister
Write Internal Register
Write next Control
Byte(s) to
IN FIFO 0
Write next Device
Data to
IN FIFO 1 or 2
SIN=1
output first bit on SDI
generating a rising edge
on SCK to latch bit by
bridge
more bits to write ?
generating a falling edge on
Yes SCK and output the next bit
on SDI
No
End of IN Transfer
SIN=0 and SCK=0
Figure 19. Writing next Device or Control Data to IN FIFO
19