Datasheet

dsPIC33F
DS70165E-page 226 Preliminary © 2007 Microchip Technology Inc.
REGISTER 19-1: UxMODE: UARTx MODE REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0
(2)
R/W-0
(2)
UARTEN — USIDL IREN
(1)
RTSMD —UEN<1:0>
bit 15 bit 8
R/W-0 HC R/W-0 R/W-0 HC R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WAKE LPBACK ABAUD URXINV BRGH PDSEL<1:0> STSEL
bit 7 bit 0
Legend: HC = Hardware cleared
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 UARTEN: UARTx Enable bit
1 = UARTx is enabled; all UARTx pins are controlled by UARTx as defined by UEN<1:0>
0 = UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption
minimal
bit 14 Unimplemented: Read as ‘0’
bit 13 USIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode.
0 = Continue module operation in Idle mode
bit 12 IREN: IrDA Encoder and Decoder Enable bit
(1)
1 = IrDA encoder and decoder enabled
0 = IrDA encoder and decoder disabled
bit 11 RTSMD: Mode Selection for UxRTS Pin bit
1 = UxRTS pin in Simplex mode
0 = UxRTS pin in Flow Control mode
bit 10 Unimplemented: Read as ‘0’
bit 9-8 UEN<1:0>: UARTx Enable bits
11 =UxTX, UxRX and BCLK pins are enabled and used; UxCTS pin controlled by port latches
10 =UxTX, UxRX, UxCTS and UxRTS pins are enabled and used
01 =UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin controlled by port latches
00 =UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/BCLK pins controlled by
port latches
bit 7 WAKE: Wake-up on Start bit Detect During Sleep Mode Enable bit
1 = UARTx will continue to sample the UxRX pin; interrupt generated on falling edge; bit cleared
in hardware on following rising edge
0 = No wake-up enabled
bit 6 LPBACK: UARTx Loopback Mode Select bit
1 = Enable Loopback mode
0 = Loopback mode is disabled
bit 5 ABAUD: Auto-Baud Enable bit
1 = Enable baud rate measurement on the next character – requires reception of a Sync field (55h);
cleared in hardware upon completion
0 = Baud rate measurement disabled or completed
bit 4 URXINV: Receive Polarity Inversion bit
1 = UxRX Idle state is ‘0’
0 = UxRX Idle state is ‘1’
Note 1: This feature is only available for the 16x BRG mode (BRGH = 0).
2: Bit availability depends on pin availability.