LM3S1751_16 Datasheet, PDF (434/679 Pages) Texas Instruments – Stellaris LM3S1751 Microcontroller

Universal Asynchronous Receivers/Transmitters (UARTs)
12.5
Register Map
Table 12-3 on page 434 lists the UART registers. The offset listed is a hexadecimal increment to the
register’s address, relative to that UART’s base address:
■ UART0: 0x4000.C000
■ UART1: 0x4000.D000
■ UART2: 0x4000.E000
Note that the UART module clock must be enabled before the registers can be programmed (see
page 215). There must be a delay of 3 system clocks after the UART module clock is enabled before
any UART module registers are accessed.
Note: The UART must be disabled (see the UARTEN bit in the UARTCTL register on page 447)
before any of the control registers are reprogrammed. When the UART is disabled during
a TX or RX operation, the current transaction is completed prior to the UART stopping.
Table 12-3. UART Register Map
Offset Name
Type
0x000 UARTDR
0x004 UARTRSR/UARTECR
0x018 UARTFR
0x020 UARTILPR
0x024 UARTIBRD
0x028 UARTFBRD
0x02C UARTLCRH
0x030 UARTCTL
0x034 UARTIFLS
0x038 UARTIM
0x03C UARTRIS
0x040 UARTMIS
0x044 UARTICR
0xFD0 UARTPeriphID4
0xFD4 UARTPeriphID5
0xFD8 UARTPeriphID6
0xFDC UARTPeriphID7
0xFE0 UARTPeriphID0
0xFE4 UARTPeriphID1
0xFE8 UARTPeriphID2
0xFEC UARTPeriphID3
R/W
R/W
RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
W1C
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0x0000.0000
0x0000.0000
0x0000.0090
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0300
0x0000.0012
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0011
0x0000.0000
0x0000.0018
0x0000.0001
Description
UART Data
UART Receive Status/Error Clear
UART Flag
UART IrDA Low-Power Register
UART Integer Baud-Rate Divisor
UART Fractional Baud-Rate Divisor
UART Line Control
UART Control
UART Interrupt FIFO Level Select
UART Interrupt Mask
UART Raw Interrupt Status
UART Masked Interrupt Status
UART Interrupt Clear
UART Peripheral Identification 4
UART Peripheral Identification 5
UART Peripheral Identification 6
UART Peripheral Identification 7
UART Peripheral Identification 0
UART Peripheral Identification 1
UART Peripheral Identification 2
UART Peripheral Identification 3
See
page
436
438
440
442
443
444
445
447
449
451
453
454
455
457
458
459
460
461
462
463
464
434
July 15, 2014
Texas Instruments-Production Data