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F21 数据表(PDF) 227 Page - Microchip Technology |
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F21 数据表(HTML) 227 Page - Microchip Technology |
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227 / 416 page  2016-2018 Microchip Technology Inc. DS30010118D-page 227 PIC24FJ256GA705 FAMILY REGISTER 18-3: I2CxSTAT: I2Cx STATUS REGISTER HSC/R-0 HSC/R-0 HSC/R-0 U-0 U-0 HSC/R/C-0 HSC/R-0 HSC/R-0 ACKSTAT TRSTAT ACKTIM — — BCL GCSTAT ADD10 bit 15 bit 8 HS/R/C-0 HS/R/C-0 HSC/R-0 HSC/R/C-0 HSC/R/C-0 HSC/R-0 HSC/R-0 HSC/R-0 IWCOL I2COV D/A PS R/W RBF TBF bit 7 bit 0 Legend: C = Clearable bit HS = Hardware Settable bit ‘0’ = Bit is cleared R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set HSC = Hardware Settable/Clearable bit bit 15 ACKSTAT: Acknowledge Status bit (updated in all Master and Slave modes) 1 = Acknowledge was not received from slave 0 = Acknowledge was received from slave bit 14 TRSTAT: Transmit Status bit (when operating as I2C master; applicable to master transmit operation) 1 = Master transmit is in progress (8 bits + ACK) 0 = Master transmit is not in progress bit 13 ACKTIM: Acknowledge Time Status bit (valid in I2C Slave mode only) 1 = Indicates I2C bus is in an Acknowledge sequence, set on 8th falling edge of SCLx clock 0 = Not an Acknowledge sequence, cleared on 9th rising edge of SCLx clock bit 12-11 Unimplemented: Read as ‘0’ bit 10 BCL: Bus Collision Detect bit (Master/Slave mode; cleared when I2C module is disabled, I2CEN = 0) 1 = A bus collision has been detected during a master or slave transmit operation 0 = No bus collision has been detected bit 9 GCSTAT: General Call Status bit (cleared after Stop detection) 1 = General call address was received 0 = General call address was not received bit 8 ADD10: 10-Bit Address Status bit (cleared after Stop detection) 1 = 10-bit address was matched 0 = 10-bit address was not matched bit 7 IWCOL: I2Cx Write Collision Detect bit 1 = An attempt to write to the I2CxTRN register failed because the I2C module is busy; must be cleared in software 0 = No collision bit 6 I2COV: I2Cx Receive Overflow Flag bit 1 = A byte was received while the I2CxRCV register is still holding the previous byte; I2COV is a “don’t care” in Transmit mode, must be cleared in software 0 = No overflow bit 5 D/A: Data/Address bit (when operating as I2C slave) 1 = Indicates that the last byte received was data 0 = Indicates that the last byte received or transmitted was an address bit 4 P: I2Cx Stop bit Updated when Start, Reset or Stop is detected; cleared when the I2C module is disabled, I2CEN = 0. 1 = Indicates that a Stop bit has been detected last 0 = Stop bit was not detected last |
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