LM3S2793 Datasheet, PDF (55/1194 Pages) Texas Instruments – Stellaris® LM3S2793 Microcontroller

Stellaris^® LM3S2793 Microcontroller
1.3.4.3
■ Support for communication with ISO 7816 smart cards
■ Full modem handshake support (on UART1)
■ LIN protocol support
■ Standard FIFO-level and End-of-Transmission interrupts
■ Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Separate channels for transmit and receive
– Receive single request asserted when data is in the FIFO; burst request asserted at
programmed FIFO level
– Transmit single request asserted when there is space in the FIFO; burst request asserted at
programmed FIFO level
I²C (see page 804)
The Inter-Integrated Circuit (I²C) bus provides bi-directional data transfer through a two-wire design
(a serial data line SDA and a serial clock line SCL). The I²C bus interfaces to external I²C devices
such as serial memory (RAMs and ROMs), networking devices, LCDs, tone generators, and so on.
The I²C bus may also be used for system testing and diagnostic purposes in product development
and manufacture.
Each device on the I²C bus can be designated as either a master or a slave. Each I²C module
supports both sending and receiving data as either a master or a slave and can operate
simultaneously as both a master and a slave. Both the I²C master and slave can generate interrupts.
The LM3S2793 microcontroller includes two I²C modules with the following features:
■ Devices on the I²C bus can be designated as either a master or a slave
– Supports both transmitting and receiving data as either a master or a slave
– Supports simultaneous master and slave operation
■ Four I²C modes
– Master transmit
– Master receive
– Slave transmit
– Slave receive
■ Two transmission speeds: Standard (100 Kbps) and Fast (400 Kbps)
■ Master and slave interrupt generation
– Master generates interrupts when a transmit or receive operation completes (or aborts due
to an error)
– Slave generates interrupts when data has been transferred or requested by a master or when
a START or STOP condition is detected
January 20, 2012
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Texas Instruments-Production Data