LM3S611 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

LM3S611

Microcontroller

Unspecified 

Architectural Overview

1.4.4.3

1.4.5

1.4.5.1

1.4.5.2

1.4.5.3

The SSI module also includes a programmable bit rate clock divider and prescaler to generate the

output serial clock derived from the SSI module’s input clock. Bit rates are generated based on the

input clock and the maximum bit rate is determined by the connected peripheral.

I2C (Section 14 on page 310)

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.

The Stellaris I2C module provides the ability to communicate to other IC devices over an I2C bus.

The I2C bus supports devices that can both transmit and receive (write and read) data.

Devices on the I2C bus can be designated as either a master or a slave. The I2C module supports

both sending and receiving data as either a master or a slave, and also supports the simultaneous

operation as both a master and a slave. The four I2C modes are: Master Transmit, Master

Receive, Slave Transmit, and Slave Receive.

The Stellaris I2C module can operate at two speeds: Standard (100 Kbps) and Fast (400 Kbps).

Both the I2C master and slave can generate interrupts. The I2C master generates interrupts when

a transmit or receive operation completes (or aborts due to an error). The I2C slave generates

interrupts when data has been sent or requested by a master.

System Peripherals

Programmable GPIOs (Section 8 on page 116)

General-purpose input/output (GPIO) pins offer flexibility for a variety of connections.

The Stellaris GPIO module is composed of five physical GPIO blocks, each corresponding to an

individual GPIO port. The GPIO module is FiRM-compliant (compliant to the ARM Foundation IP

for Real-Time Microcontrollers specification) and supports 4 to 32 programmable input/output pins.

The number of GPIOs available depends on the peripherals being used (see Table 17-4 on

page 386 for the signals available to each GPIO pin).

The GPIO module features programmable interrupt generation as either edge-triggered or

level-sensitive on all pins, programmable control for GPIO pad configuration, and bit masking in

both read and write operations through address lines.

Three Programmable Timers (Section 9 on page 154)

Programmable timers can be used to count or time external events that drive the Timer input pins.

The Stellaris General-Purpose Timer Module (GPTM) contains three GPTM blocks. Each GPTM

block provides two 16-bit timer/counters that can be configured to operate independently as timers

or event counters, or configured to operate as one 32-bit timer or one 32-bit Real-Time Clock

(RTC). Timers can also be used to trigger analog-to-digital (ADC) conversions.

When configured in 32-bit mode, a timer can run as a one-shot timer, periodic timer, or Real-Time

Clock (RTC). When in 16-bit mode, a timer can run as a one-shot timer or periodic timer, and can

extend its precision by using an 8-bit prescaler. A 16-bit timer can also be configured for event

capture or Pulse Width Modulation (PWM) generation.

Watchdog Timer (Section 10 on page 186)

A watchdog timer can generate nonmaskable interrupts (NMIs) or a reset when a time-out value is

reached. The watchdog timer is used to regain control when a system has failed due to a software

error or to the failure of an external device to respond in the expected way.

30

April 27, 2007

Preliminary

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