PIC32MX1XX_12 Datasheet, PDF (180/328 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER
Bit
Bit
Bit
Bit
Bit
Bit
Bit
Range 31/23/15/7 30/22/14/6 29/21/13/5 28/20/12/4 27/19/11/3 26/18/10/2
31:24
23:16
15:8
7:0
U-0
—
R/W-0
U-0
—
R/W-0
R/W-0
R/W-0
UTXISEL<1:0>
R/W-0
R/W-0
URXISEL<1:0>
U-0
—
R/W-0
R/W-0
UTXINV
R/W-0
ADDEN
U-0
U-0
—
—
R/W-0
R/W-0
ADDR<7:0>
R/W-0
URXEN
R/W-0
UTXBRK
R-1
RIDLE
R-0
PERR
U-0
—
R/W-0
R/W-0
UTXEN
R-0
FERR
Bit
25/17/9/1
U-0
—
R/W-0
R-0
UTXBF
R/W-0
OERR
Bit
24/16/8/0
R/W-0
ADM_EN
R/W-0
R-1
TRMT
R-0
URXDA
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 31-25 Unimplemented: Read as ‘0’
bit 24
ADM_EN: Automatic Address Detect Mode Enable bit
1 = Automatic Address Detect mode is enabled
0 = Automatic Address Detect mode is disabled
bit 23-16 ADDR<7:0>: Automatic Address Mask bits
When the ADM_EN bit is ‘1’, this value defines the address character to use for automatic address
detection.
bit 15-14 UTXISEL<1:0>: TX Interrupt Mode Selection bits
11 = Reserved, do not use
10 = Interrupt is generated and asserted while the transmit buffer is empty
01 = Interrupt is generated and asserted when all characters have been transmitted
00 = Interrupt is generated and asserted while the transmit buffer contains at least one empty space
bit 13
UTXINV: Transmit Polarity Inversion bit
If IrDA mode is disabled (i.e., IREN (UxMODE<12>) is ‘0’):
1 = UxTX Idle state is ‘0’
0 = UxTX Idle state is ‘1’
bit 12
bit 11
bit 10
bit 9
bit 8
If IrDA mode is enabled (i.e., IREN (UxMODE<12>) is ‘1’):
1 = IrDA encoded UxTX Idle state is ‘1’
0 = IrDA encoded UxTX Idle state is ‘0’
URXEN: Receiver Enable bit
1 = UARTx receiver is enabled. UxRX pin is controlled by UARTx (if ON = 1)
0 = UARTx receiver is disabled. UxRX pin is ignored by the UARTx module. UxRX pin is controlled by port.
UTXBRK: Transmit Break bit
1 = Send Break on next transmission. Start bit followed by twelve ‘0’ bits, followed by Stop bit; cleared by
hardware upon completion
0 = Break transmission is disabled or completed
UTXEN: Transmit Enable bit
1 = UARTx transmitter is enabled. UxTX pin is controlled by UARTx (if ON = 1).
0 = UARTx transmitter is disabled. Any pending transmission is aborted and buffer is reset. UxTX pin is con-
trolled by port.
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
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
DS61168E-page 180
Preliminary
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