Embedded MPU optimized for automation and consumer applications

The SPEAr310 is a member of the SPEAr family of embedded MPUs, optimized for telecom applications. 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, SPEAr310 has an MMU that allows virtual memory management -- making the system compliant with advanced operating systems, like Linux. 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 routers, switches and gateways as well as remote apparatus control and metering concentrators.

Key Features

  • SecurityC3 Cryptographic accelerator
  • Connectivity2 x USB 2.0 HostUSB 2.0 Device1 x fast Ethernet MII port4 x fast Ethernet SMII ports1 x SSP Synchronous serial peripheral (SPI, Microwire or TI protocol) with 4 chip selects1 x I2 C1 x fast IrDA interface6 x UART interface1x TDM/E1 HDLC interface with 128/32 timeslots per frame respectively2x RS485 HDLC ports
  • ARM926EJ-S 333 MHz core
  • Dynamic power-saving features
  • High-performance 8-channel DMA
  • Memory:32 KB ROM and 8 KB internal SRAMLPDDR-333/DDR2-666 external memory interfaceSerial Flash Memory interface (SMI)Flexible static memory controller (FSMC) up to 16-bit data bus width, supporting NAND FlashExternal memory interface (EMI) up to 32- bit data bus width, supporting NOR Flash and FPGAs
  • Miscellaneous functionsIntegrated real time clock, watchdog, and system controller8-channel 10-bit ADC, 1 MspsJPEG CODEC acceleratorSix 16-bit general purpose timers with programmable prescaler, 4 capture inputsUp to 102 GPIOs with interrupt capability
  • Configurable peripheral functions multiplexed on 102 shared I/Os



Description Version Size
DS6524 DS6524: Embedded MPU with ARM926 core, flexible memory support, extended set of powerful connectivity features 2.1 905 KB
Description Version Size
AN3100 AN3100: Configuring the SPEAr3xx multi-port memory controller (MPMC) for external DDR SDRAM 2.1 302 KB
AN3140 AN3140: How to configure the SPEAr3xx general purpose timers (GPTs) 1.2 266 KB
AN3321 AN3321: How to enable remote reset from JTAG on EVALSPEAr310 board rev 2.0 1.0 257 KB
AN3099 AN3099: IBIS models for signal integrity simulation of SPEAr3xx applications 1.3 220 KB
AN2674 AN2674: PCB layout guidelines for SPEAr3xx 2.3 543 KB
AN3129 AN3129: Real-time performance using FIQ interrupt handling in SPEAr MPUs 1.3 188 KB
AN3123 AN3123: Using the UART interfaces in the SPEAr embedded MPU family 2.1 218 KB
Description Version Size
UM0843 UM0843: EVALSPEAr310 - evaluation board for the SPEAr310 2.2 866 KB
UM1015 UM1015: EVALSPEAr320CPU SPEAr320 CPU evaluation board 1.0 1 MB
UM1535 UM1535: Getting started with SPEAr® Linux support package (LSP 3.2.5) 2.1 486 KB
UM0844 UM0844: Getting started with SPEAr® Linux support package (LSP2.3) 3.0 694 KB
UM0851 UM0851: Linux support package (LSP) v2.3 for SPEAr 2.2 3 MB
Description Version Size
RM0082 RM0082: SPEAr300 1.3 5 MB
Description Version Size
RN0081 RN0081: Linux support package (LSP) v3.2.3 for SPEAr eMPU family 2.1 217 KB
RN0082 RN0082: Linux support package (LSP) v3.2.5 for SPEAr eMPU family 1.1 237 KB
RN0053 RN0053: Linux support package for SPEAr (LSP) v 2.3 1.1 78 KB
RN0080 RN0080: Linux support package for SPEAr (LSP) v 2.3.2 1.1 86 KB


Board Manufacturing Specifications
Description Version Size
PCB trace length worksheet for SPEAr3xx evaluation boards 2.1 20 KB


Description Version Size
SPEAr family of embedded microprocessors 2.2 732 KB


Software Development Tools


型号 Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SPEAR310-2 LFBGA 289 15x15x1.7 Tray -40 85 NRND - - 5A002A4 5A002A4 SINGAPORE MORE INFO No availability reported, please contact our Sales office

(*) 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


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SPEAR310-2 NRNDLFBGA 289 15x15x1.7IndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com 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.