70291E Datasheet, PDF (242/436 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
REGISTER 20-1: UxMODE: UARTx MODE REGISTER
R/W-0
U-0
UARTEN⁽¹⁾
—
bit 15
R/W-0
R/W-0
R/W-0
U-0
USIDL
IREN⁽²⁾
RTSMD
—
R/W-0
R/W-0
UEN<1:0>
bit 8
R/W-0 HC
WAKE
bit 7
R/W-0
LPBACK
R/W-0 HC
ABAUD
R/W-0
URXINV
R/W-0
BRGH
R/W-0
R/W-0
PDSEL<1:0>
R/W-0
STSEL
bit 0
Legend:
R = Readable bit
-n = Value at POR
HC = Hardware cleared
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9-8
bit 7
bit 6
bit 5
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
Unimplemented: Read as ‘0’
USIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
IREN: IrDA^® Encoder and Decoder Enable bit⁽²⁾
1 = IrDA encoder and decoder enabled
0 = IrDA encoder and decoder disabled
RTSMD: Mode Selection for UxRTS Pin bit
1 = UxRTS pin in Simplex mode
0 = UxRTS pin in Flow Control mode
Unimplemented: Read as ‘0’
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
WAKE: Wake-up on Start bit Detect During Sleep Mode Enable bit
1 = UARTx continues to sample the UxRX pin; interrupt generated on falling edge; bit cleared
in hardware on following rising edge
0 = No wake-up enabled
LPBACK: UARTx Loopback Mode Select bit
1 = Enable Loopback mode
0 = Loopback mode is disabled
ABAUD: Auto-Baud Enable bit
1 = Enable baud rate measurement on the next character – requires reception of a Sync field (55h)
before other data; cleared in hardware upon completion
0 = Baud rate measurement disabled or completed
Note 1: Refer to Section 17. “UART” (DS70188) in the “dsPIC33F/PIC24H Family Reference Manual” for
information on enabling the UART module for receive or transmit operation.
2: This feature is only available for the 16x BRG mode (BRGH = 0).
DS70291E-page 242
© 2011 Microchip Technology Inc.