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PIC16C745/P датащи(PDF) 76 Page - Microchip Technology |
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PIC16C745/P датащи(HTML) 76 Page - Microchip Technology |
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76 / 158 page ![]() PIC16C745/765 DS41124A-page 76 Advanced Information © 1999 Microchip Technology Inc. REGISTER 11-2: RECEIVE STATUS AND CONTROL REGISTER (RCSTA: 18h) R/W-0 R/W-0 R/W-0 R/W-0 U-0 R-0 R-0 R-x SPEN RX9 SREN CREN — FERR OERR RX9D R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR reset bit7 bit0 bit 7: SPEN: Serial Port Enable bit 1 = Serial port enabled (Configures RC7/RX/DT and RC6/TX/CK pins as serial port pins) 0 = Serial port disabled bit 6: RX9: 9-bit Receive Enable bit 1 = Selects 9-bit reception 0 = Selects 8-bit reception bit 5: SREN: Single Receive Enable bit Asynchronous mode Don’t care Synchronous mode - master 1 = Enables single receive 0 = Disables single receive This bit is cleared after reception is complete. Synchronous mode - slave Unused in this mode bit 4: CREN: Continuous Receive Enable bit Asynchronous mode 1 = Enables continuous receive 0 = Disables continuous receive Synchronous mode 1 = Enables continuous receive until enable bit CREN is cleared (CREN overrides SREN) 0 = Disables continuous receive bit 3: Unimplemented: Read as '0' bit 2: FERR: Framing Error bit 1 = Framing error (Can be updated by reading RCREG register and receive next valid byte) 0 = No framing error bit 1: OERR: Overrun Error bit 1 = Overrun error (Can be cleared by clearing bit CREN) 0 = No overrun error bit 0: RX9D: 9th bit of received data. (Can be used for parity.) |
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