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UPSD3422 Datasheet(PDF) 161 Page - STMicroelectronics

Part # UPSD3422
Description  Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic
PDF  293 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UPSD3422 Datasheet(HTML) 161 Page - STMicroelectronics

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uPSD34xx
USB interface
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USB OUT FIFO Interrupt Flag (UIF2)
The USB OUT FIFO Interrupt Flag register (see Table 78) contains flags that indicate
when an OUT Endpoint FIFO that was empty becomes full. Once set, firmware must
clear the flag by writing a '0' to the appropriate bit. When FIFOs are paired, only the
odd numbered FIFO Interrupt flags are active.
Table 78.
USB OUT FIFO interrupt flag (UIF2 0EAh, reset value 00h)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
–
–
–
OUT4F
OUT3F
OUT2F
OUT1F
OUT0F
Bit
Symbol
R/W
Definition
7
–
–
Reserved
6
–
–
Reserved
5
–
–
Reserved
4OUT4F
R/W
Endpoint 4 OUT FIFO Interrupt flag
This bit is set when the FIFO status changes from empty to
full.
3OUT3F
R/W
Endpoint 3 OUT FIFO Interrupt flag
This bit is set when the FIFO status changes from empty to
full.
2OUT2F
R/W
Endpoint 2 OUT FIFO Interrupt flag
This bit is set when the FIFO status changes from empty to
full.
1OUT1F
R/W
Endpoint 1 OUT FIFO Interrupt flag
This bit is set when the FIFO status changes from empty to
full.
0OUT0F
R/W
Endpoint 0 OUT FIFO Interrupt flag
This bit is set when the FIFO status changes from empty to
full.



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