LM3S6611 Datasheet, PDF (385/647 Pages) List of Unclassifed Manufacturers – Microcontroller

Stellaris^® LM3S6611 Microcontroller
11.1 Block Diagram
Figure 11-1. UART Module Block Diagram
System Clock
Interrupt
Identification
Registers
UARTPCellID0
UARTPCellID1
UARTPCellID2
UARTPCellID3
UARTPeriphID0
UARTPeriphID1
UARTPeriphID2
UARTPeriphID3
UARTPeriphID4
UARTPeriphID5
UARTPeriphID6
UARTPeriphID7
Interrupt Control
UARTIFLS
UARTIM
UARTMIS
UARTRIS
UARTICR
UARTDR
Control/Status
UARTRSR/ECR
UARTFR
UARTLCRH
UARTCTL
UARTILPR
TxFIFO
16 x 8
.
.
.
Baud Rate
Generator
UARTIBRD
UARTFBRD
RxFIFO
16 x 8
.
.
.
Transmitter
(with SIR
Transmit
Encoder)
UnTx
Receiver
(with SIR
Receive
Decoder)
UnRx
11.2
Signal Description
Table 11-1 on page 385 and Table 11-2 on page 386 list the external signals of the UART module
and describe the function of each. The UART signals are alternate functions for some GPIO signals
and default to be GPIO signals at reset, with the exception of the U0Rx and U0Tx pins which default
to the UART function. The column in the table below titled "Pin Assignment" lists the possible GPIO
pin placements for these UART signals. The AFSEL bit in the GPIO Alternate Function Select
(GPIOAFSEL) register (page 299) should be set to choose the UART function. For more information
on configuring GPIOs, see “General-Purpose Input/Outputs (GPIOs)” on page 277.
Table 11-1. UART Signals (100LQFP)
Pin Name
U0Rx
Pin Number
26
Pin Type
I
U0Tx
27
O
U1Rx
12
I
Buffer Type^a Description
TTL
UART module 0 receive. When in IrDA mode, this signal has
IrDA modulation.
TTL
UART module 0 transmit. When in IrDA mode, this signal has
IrDA modulation.
TTL
UART module 1 receive. When in IrDA mode, this signal has
IrDA modulation.
July 16, 2014
385
Texas Instruments-Production Data