LM3S1651 Datasheet, PDF (48/1033 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Architectural Overview
1.3.4
■ Configurable audio format supporting I²S, Left-justification, and Right-justification
■ Configurable sample size from 8 to 32 bits
■ Mono and Stereo support
■ 8-, 16-, and 32-bit FIFO interface for packing memory
■ Independent transmit and receive 8-entry FIFOs
■ Configurable FIFO-level interrupt and µDMA requests
■ Independent transmit and receive MCLK direction control
■ Transmit and receive internal MCLK sources
■ Independent transmit and receive control for serial clock and word select
■ MCLK and SCLK can be independently set to master or slave
■ Configurable transmit zero or last sample when FIFO empty
■ Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Separate channels for transmit and receive
– Burst requests
– Channel requests asserted when FIFO contains required amount of data
System Integration
The LM3S1651 microcontroller provides a variety of standard system functions integrated into the
device, including:
■ Direct Memory Access Controller (DMA)
■ System control and clocks including on-chip precision 16-MHz oscillator
■ Four 32-bit timers (up to eight 16-bit)
■ Eight Capture Compare PWM (CCP) pins
■ Lower-power battery-backed Hibernation module
■ Real-Time Clock in Hibernation module
■ Two Watchdog Timers
– One timer runs off the main oscillator
– One timer runs off the precision internal oscillator
■ Up to 67 GPIOs, depending on configuration
– Highly flexible pin muxing allows use as GPIO or one of several peripheral functions
– Independently configurable to 2, 4 or 8 mA drive capability
– Up to 4 GPIOs can have 18 mA drive capability
The following sections provide more detail on each of these functions.
48
January 21, 2012
Texas Instruments-Production Data