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Embedded MPU with ARM926 core for industrial and consumer applications
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SPEAr320S is a member of the SPEAr family of embedded MPUs and is optimized for industrial automation and consumer markets. The device is based on the ARM926EJ-S processor (up to 333 MHz), widely used in applications where the processing performance is required to be higher than the one achievable with microcontrollers.

SPEAr320S provides an integrated MMU (memory management unit) which enables to support high-level operating systems (HLLs), such as Linux and Windows Embedded Compact 7. In addition, a rich set of integrated peripherals (memory interfaces, connectivity, HMI, cryptography) allows the device to be used in a wide range of embedded applications.

The SPEAr320S architecture is based on multiple functional blocks interacting through a multilayer interconnection bus matrix. The switch matrix structure allows different subsystem data flows to be executed in parallel improving the core platform efficiency. High performance master agents are directly interconnected with the memory controller reducing the memory access latency. The overall memory bandwidth assigned to each master port can be programmed and optimized through an internal efficient weighted round-robin arbitration mechanism.

The SPEAr320S device is fully backward-compatible with the previous SPEAr320 product at both hardware and software programming levels. The extended functionality is achieved by enhanced I/O multiplexing, preserving the same pinout and ball map, as well as by a new software-definable configuration mode.

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Errata Sheet
pdf データシート

Key Features

  • ARM926EJ-S CPU core, up to 333 MHz
  • Multilayer bus matrix, up to 166 MHz
  • Internal memories: 32 KB ROM, 8 KB SRAM
  • Memory interfaces:
  • DDR controller (DDR2-666, LPDDR-333), 8-/16-bit
  • Serial NOR Flash controller
  • Parallel NAND Flash controller, 8-/16-bit data bus
  • Parallel NOR Flash/FPGA interface, 8-/16-bit data bus
  • Connectivity:
  • 2 x USB 2.0 Host ports (integrated PHY)
  • 1 x USB 2.0 Device port (integrated PHY)
  • 2 x Fast Ethernet ports (external MII/RMII PHY)
  • 1 x MMC-SD card/SDIO controller
  • 2 x CAN 2.0 ports
  • 7 x UART ports
  • 3 x I2C ports: master/slave
  • 3 x synchronous serial ports, SPI/Microwire/TI protocols, master/slave
  • 1 x RS485 interface
  • 1 x fast IrDA interface
  • 1 x legacy parallel port (IEEE 1284), slave mode
  • 10-bit ADC, 8 channels, 1 Msps
  • Up to 102 GPIOs with interrupt capability
  • HMI support:
  • LCD display controller, up to XGA (1024 x 768, 24 bpp)
  • Resistive touchscreen interface
  • JPEG codec accelerator
  • 1 x I2S digital audio port
  • Security
  • Cryptographic co-processor
  • Miscellaneous functions:
  • System controller, vectored interrupt controller, watchdog, real-time clock
  • Dynamic power-saving features
  • 8-channel DMA controller
  • 6 x 16-bit general purpose timers with prescaler and 4 capture inputs
  • 4 x PWM generators
  • Debug and trace interfaces: JTAG/ETM



Technical Documentation

Product Specifications

Description Version Size
DS8759: Embedded MPU with ARM926 core for industrial and consumer applications
2.0 1,519 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
UM1015: EVALSPEAr320CPU SPEAr320 CPU evaluation board
1.0 1,381 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
RM0319: SPEAr320S architecture and functionality
4.0 3,441 KB
RM0321: SPEAr320S address map and registers
3.0 3,615 KB

Release Notes

Description Version Size
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

Presentations & Training Material


Description Version Size
DLMS/COSEM solution for power-line communication
1.1 1,047 KB
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

製品型名 Description
EVALSP320SPLC SPEAr320S evaluation kit for PLC applications
EVALSP320SCPU SPEAr320S CPU evaluation board
EVALSP320SHMI SPEAr320S HMI evaluation board
STSW-SPEAR020 EVALSP320S Flash Images (XLoader/U-Boot/Linux)
STSW-SPEAR010 Root Filesystem Flash Image for NAND (small page)
STSW-SPEAR011 Root Filesystem Flash Image for serial NOR
STSW-SPEAR012 Root Filesystem Flash Image for NAND (large page)
STSW-SPEAR013 EVALSP320SHMI Flash Images (XLoader/U-Boot/Linux)
STSW-SPEAR009 USB flasher for SPEAR

Publications and Collaterals


Description Version Size
SPEAr320S embedded microprocessor
1.0.0 292 KB


Description Version Size
SPEAr family of embedded microprocessors
1.0.0 732 KB

サンプル& 購入

製品型名 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
SPEAR320S-2ActiveLFBGA 289Tray-4085_-Distributor reported inventory date: 2015-07-07
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA6672756

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