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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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TMP86CS44UG Scheda tecnica(PDF) 141 Page - Toshiba Semiconductor |
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TMP86CS44UG Scheda tecnica(HTML) 141 Page - Toshiba Semiconductor |
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141 / 172 page  Page 131 TMP86CS44UG 12.9 Status Flag 12.9.1 Parity Error When parity determined using the receive data bits differs from the received parity bit, the parity error flag UARTSR<PERR> is set to “1”. The UARTSR<PERR> is cleared to “0” when the RDBUF is read after read- ing the UARTSR. Figure 12-5 Generation of Parity Error 12.9.2 Framing Error When “0” is sampled as the stop bit in the receive data, framing error flag UARTSR<FERR> is set to “1”. The UARTSR<FERR> is cleared to “0” when the RDBUF is read after reading the UARTSR. Figure 12-6 Generation of Framing Error 12.9.3 Overrun Error When all bits in the next data are received while unread data are still in RDBUF, overrun error flag UARTSR<OERR> is set to “1”. In this case, the receive data is discarded; data in RDBUF are not affected. The UARTSR<OERR> is cleared to “0” when the RDBUF is read after reading the UARTSR. Parity Stop Shift register pxxxx0* 1pxxxx0 xxxx0** RXD pin UARTSR<PERR> INTRXD interrupt After reading UARTSR then RDBUF clears PERR. Final bit Stop Shift register xxxx0* 0xxxx0 xxx0** RXD pin UARTSR<FERR> INTRXD interrupt After reading UARTSR then RDBUF clears FERR. |
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