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AT90USB646 Datasheet(PDF) 309 Page - ATMEL Corporation |
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AT90USB646 Datasheet(HTML) 309 Page - ATMEL Corporation |
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309 / 434 page  309 7593A–AVR–02/06 AT90USB64/128 • 7-6 - Reserved The value read from these bits is always 0. Do not set these bits. • 5 - COUNTER1:0 - Error counter This counter is increased by the USB controller each time an error occurs on the Pipe. When this value reaches 3, the Pipe is automatically frozen. Clear these bits by software. • 4 - CRC16 - CRC16 Error Set by hardware when a CRC16 error has been detected. Shall be cleared by software. Setting by software has no effect. • 3 - TIMEOUT - Time-out Error Set by hardware when a time-out error has been detected. Shall be cleared by software. Setting by software has no effect. • 2 - PID - PID Error Set by hardware when a PID error has been detected. Shall be cleared by software. Setting by software has no effect. • 1 - DATAPID - Data PID Error Set by hardware when a data PID error has been detected. Shall be cleared by software. Setting by software has no effect. • 0 - DATATGL - Bad Data Toggle Set by hardware when a data toggle error has been detected. Shall be cleared by software. Setting by software has no effect. • 7 - FIFOCON - FIFO Control For OUT and SETUP Pipe: Set by hardware when the current bank is free, at the same time than TXOUT or TXSTP. Clear to send the FIFO data and to switch the bank. Setting by software has no effect. For IN Pipe: Set by hardware when a new IN message is stored in the current bank, at the same time than RXIN. Bit 7 65 43 2 1 0 FIFOCON NAKEDI RWAL PERRI TXSTPI TXOUTI RXSTALLI RXINI UPINTX Read/Write RW RW RW RW RW RW RW RW Initial Value 0 0 0 0 0 0 0 0 |
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