Datasheet

PIC24F04KA201 FAMILY
DS39937B-page 136 Preliminary © 2009 Microchip Technology Inc.
REGISTER 17-1: U1MODE: UART1 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 — UEN1 UEN0
bit 15 bit 8
R/C-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 RXINV BRGH PDSEL1 PDSEL0 STSEL
bit 7 bit 0
Legend: C = Clearable bit HC = Hardware Clearable bit
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: UART1 Enable bit
1 = UART1 is enabled; all UART1 pins are controlled by UART1 as defined by UEN<1:0>
0 = UART1 is disabled; all UART1 pins are controlled by port latches; UART1 power consumption is
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 U1RTS
Pin bit
1 =U1RTS pin in Simplex mode
0 =U1RTS
pin in Flow Control mode
bit 10 Unimplemented: Read as ‘0’
bit 9-8 UEN<1:0>: UART1 Enable bits
(2)
11 = U1TX, U1RX and U1BCLK pins are enabled and used; U1CTS pin controlled by port latches
10 = U1TX, U1RX, U1CTS
and U1RTS pins are enabled and used
01 = U1TX, U1RX and U1RTS
pins are enabled and used; U1CTS pin controlled by port latches
00 = U1TX and UxRX pins are enabled and used; U1CTS
and U1RTS/U1BCLK pins controlled by port
latches
bit 7 WAKE: Wake-up on Start Bit Detect During Sleep Mode Enable bit
1 = UART1 will continue to sample the U1RX pin; interrupt generated on falling edge, bit cleared in
hardware on following rising edge
0 = No wake-up enabled
bit 6 LPBACK: UART1 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 RXINV: Receive Polarity Inversion bit
1 = U1RX Idle state is ‘0’
0 = U1RX 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.