PIC32MX440F256H-80I Datasheet, PDF (433/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
REGISTER 19-2: UxSTA: UARTx STATUS REGISTER (CONTINUED)
bit 10
UTXEN: Transmit Enable bit
1 = UARTx transmitter enabled, UxTX pin controlled by UARTx (if ON = 1)
0 = UARTx transmitter disabled, any pending transmission is aborted and buffer is reset. UxTX pin
controlled by PORT.
bit 9
UTXBF: Transmit Buffer Full Status bit (read-only)
1 = Transmit buffer is full
0 = Transmit buffer is not full, at least one more character can be written
bit 8
TRMT: Transmit Shift Register is Empty bit (read-only)
1 = Transmit shift register is empty and transmit buffer is empty (the last transmission has completed)
0 = Transmit shift register is not empty, a transmission is in progress or queued in the transmit buffer
bit 7-6
URXISEL<1:0>: Receive Interrupt Mode Selection bit
11 = Interrupt flag bit is set when Receive Buffer is full (i.e., has 4 data characters)
10 = Interrupt flag bit is set when Receive Buffer is 3/4 full (i.e., has 3 data characters)
0x = Interrupt flag bit is set when a character is received
bit 5
ADDEN: Address Character Detect (bit 8 of received data = 1)
1 = Address Detect mode enabled. If 9-bit mode is not selected, this control bit has no effect.
0 = Address Detect mode disabled
bit 4
RIDLE: Receiver Idle bit (read-only)
1 = Receiver is Idle
0 = Data is being received
bit 3
PERR: Parity Error Status bit (read-only)
1 = Parity error has been detected for the current character
0 = Parity error has not been detected
bit 2
FERR: Framing Error Status bit (read-only)
1 = Framing Error has been detected for the current character
0 = Framing Error has not been detected
bit 1
OERR: Receive Buffer Overrun Error Status bit (clear/read-only)
1 = Receive buffer has overflowed
0 = Receive buffer has not overflowed (clearing a previously set OERR bit will reset the receiver buffer
and Receive Shift Register (RSR) to an empty state)
bit 0
RXDA: Receive Buffer Data Available bit (read-only)
1 = Receive buffer has data, at least one more character can be read
0 = Receive buffer is empty
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 431