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Embedded MPU optimized for VoIP, HMI and security applications

The SPEAr300 is a member of the SPEAr family of embedded MPUs for networked devices.

It is based on the powerful ARM926EJ-S processor (up to 333 MHz), widely used in applications where high computation performance is required.

In addition, SPEAr300 has an MMU that allows virtual memory management -- making the system compliant with Linux operating system. It also offers 16 KB of data cache, 16 KB of instruction cache, JTAG and ETM (embedded trace macro-cell) for debug operations.

A full set of peripherals allows the system to be used in many applications, some typical applications being HMI, Security and VoIP phones.

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Errata Sheet
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Key Features

  • ARM926EJ-S core up to 333 MHz
  • High-performance 8-channel DMA
  • Dynamic power-saving features
  • Configurable peripheral functions on 102 shared I/Os
  • Memory32 KB ROM and 56 KB internal SRAMLPDDR-333/DDR2-666 external memory interface (up to 1 GB addressable memory)SDIO/MMC card interfaceSerial Flash memory interface (SMI)Flexible static memory controller (FSMC) up to 16-bit data bus width, supporting external SRAM, NAND/NOR Flash and FPGAsSerial SPI Flash interface
  • Connectivity2 x USB 2.0 HostUSB 2.0 DeviceFast Ethernet (MII port)1x SSP Synchronous serial peripheral (SPI, Microwire or TI protocol)1x I2C1x I2S,1x fast IrDA interface1x UART interfaceTDM bus (512 timeslots)Up to 8 additional I2C/SPI chip selects
  • SecurityC3 cryptographic accelerator
  • Peripherals supportedCamera interface (ITU-601/656 and CSI2 support)TFT/STN LCD controller (resolution up to 1024 x 768 and up to 24 bpp)Touchscreen support (using the ADC)9 x 9 keyboard controllerGlueless management of up to 8 SLICs/CODECs
  • Miscellaneous functionsIntegrated real time clock, watchdog, and system controller8-channel 10-bit ADC, 1 Msps1-bit DACJPEG codec acceleratorSix 16-bit general purpose timers with capture mode and programmable prescalerUp to 62 GPIOs

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS6500: Embedded MPU with ARM926 core, flexible memory support, powerful connectivity features and human machine interface
2.1 1,032 KB

Application Notes

Description Version Size
AN2641: Using the color LCD controller (CLCD) in the SPEAr embedded MPU family
1.3 419 KB
AN2674: PCB layout guidelines for SPEAr3xx
2.2 544 KB
AN3099: IBIS models for signal integrity simulation of SPEAr3xx applications
1.2 220 KB
AN3100: Configuring the SPEAr3xx multi-port memory controller (MPMC) for external DDR SDRAM
2.0 302 KB
AN3123: Using the UART interfaces in the SPEAr embedded MPU family
2.0 218 KB
AN3129: Real-time performance using FIQ interrupt handling in SPEAr MPUs
1.2 188 KB
AN3140: How to configure the SPEAr3xx general purpose timers (GPTs)
1.1 267 KB

User Manual

Description Version Size
UM0804: EVALSPEAr300 - evaluation board for the SPEAr300
2.2 477 KB
UM0844: Getting started with SPEAr® Linux support package (LSP2.3)
3.0 702 KB
UM0851: Linux support package (LSP) v2.3 for SPEAr
2.1 3,911 KB
UM1015: EVALSPEAr320CPU SPEAr320 CPU evaluation board
1.0 1,381 KB
UM1038: Hardware interconnection of the STM32™, SPEAr™3xx, and ST75xx
1.2 797 KB
UM1535: Getting started with SPEAr® Linux support package (LSP 3.2.5)
2.0 486 KB

Reference Manual

Description Version Size
RM0082: SPEAr300
1.2 5,979 KB

Release Notes

Description Version Size
RN0053: Linux support package for SPEAr (LSP) v 2.3
1.1 79 KB
RN0080: Linux support package for SPEAr (LSP) v 2.3.2
1.0 86 KB
RN0081: Linux support package (LSP) v3.2.3 for SPEAr eMPU family
2.0 218 KB
RN0082: Linux support package (LSP) v3.2.5 for SPEAr eMPU family
1.0 237 KB

Errata Sheet

Description Version Size
ES0132: SPEAr300 embedded MPU known limitations
2.1 53 KB

Presentations & Training Material


Description Version Size
Getting started with Linux OS for SPEAr eMPUs
2.4 107 KB
SPEAr customizable processors
1.0 478 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
PCB trace length worksheet for SPEAr3xx evaluation boards
1.1.0 20 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-SPEAR007 STLinux for SPEAr Install Script and User Manual
STSW-SPEAR009 USB flasher for SPEAR
STSW-SPEAR022 EVALSP300 Flash Images (XLoader/U-Boot/Linux)
STSW-SPEAR012 Root Filesystem Flash Image for NAND (large page)
STSW-SPEAR008 USB Flasher (Windows PC)
STSW-SPEAR011 Root Filesystem Flash Image for serial NOR
STSW-SPEAR010 Root Filesystem Flash Image for NAND (small page)
EVALSPEAr300 SPEAr300 evaluation board

Publications and Collaterals


Description Version Size
1.0 305 KB


Description Version Size
SPEAr family of embedded microprocessors
1.0.0 732 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SPEAR300-2NRNDLFBGA 289 15x15x1.7Tray-4085_-No availability reported, please contact our Sales officeEcopack2-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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