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UPSD3422 Datasheet(PDF) 167 Page - STMicroelectronics |
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UPSD3422 Datasheet(HTML) 167 Page - STMicroelectronics |
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167 / 300 page ![]() Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) UPSD3422, UPSD3433, UPSD3434, UPSD3454 USB interface 167/300 ● USB IN FIFO interrupt flag (UIF1) The USB IN FIFO Interrupt Flag register (see Table 114) contains flags that indicate when an IN Endpoint FIFO that was full becomes empty. 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 114. USB IN FIFO interrupt flag (UIF1 0E9h, reset value 00h) Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 – – – IN4F IN3F IN2F IN1F IN0F Table 115. UIF1 register bit definition Bit Symbol R/W Definition 7 – – Reserved 6 – – Reserved 5 – – Reserved 4IN4F R/W Endpoint 4 IN FIFO Interrupt flag This bit is set when the FIFO status changes from full to empty. 3IN3F R/W Endpoint 3 IN FIFO Interrupt flag This bit is set when the FIFO status changes from full to empty. 2IN2F R/W Endpoint 2 IN FIFO Interrupt flag This bit is set when the FIFO status changes from full to empty. 1IN1F R/W Endpoint 1 IN FIFO Interrupt flag This bit is set when the FIFO status changes from full to empty. 0IN0F R/W Endpoint 0 IN FIFO Interrupt flag This bit is set when the FIFO status changes from full to empty. Obsolete Product(s) - Obsolete Product(s) |
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