Updated ARM DDR and DDR2 Memory Controllers Offer DDR PHY (DFI) Interface Support
The PL342 memory controller complements ARM's existing broad range of memory controllers and Physical IP and will enable SoC designers to take full advantage of LPDDR2, particularly in applications such as mobile multimedia, networking and consumer applications, which require high bandwidth access and low power consumption, and have multiple bus masters which require access to shared memory. LPDDR2 memory is emerging as a compelling solution for next-generation mobile and embedded applications and ARM has been an active participant in the JEDEC committee defining the LPDDR2 standard.
The ARM PL342 dynamic memory controller offers a highly configurable interface between the AMBA(R) 3AXI(TM) protocol and LPDDR2 memory, tuning the memory interface to provide breakthrough efficiency, managing transactions through arbitration and scheduling, delivering quality of service (QoS) support, and minimizing latency in memory access to maximize system-on-chip (SoC) performance. Further, the PL342 memory controller features numerous energy-saving functions, including partial and full power-down and pre-charging of memories without affecting data flow.
The PL342 memory controller's modular design enables it to be adapted for use with many types of dynamic memory. Future releases will add support for additional memory types to provide optimal solutions for current and planned CPU and GPU cores.
ARM is a contributing member of the industry consortium defining the DFI (DDR PHY Interface) specification, and the PL342 memory controller will be an early adopter of the DFI 2.1 specification. The DFI compliant PHYs being developed by the ARM Physical IP division will enable ARM PrimeCell memory controllers to provide improved processor performance while simplifying design implementations.
The PL342 memory controller is one of a number of new additions to the ARM memory controller family, all of which will support DFI. Other new additions include:
- a new version of the popular PL340 DDR/LPDDR dynamic memory controller
offering LPDDR-NVM support
- a new version of its PL341 DDR2 dynamic memory controller, featuring
ECC (Error Correcting Code) support - a critical feature for automotive
and networking applications.
"As LPDDR2 memory becomes more widely available, designers will be looking for new ways to bridge the performance gap between external memory and SoC processors, and take full advantage of advanced low-power memory systems. The ARM PL342 dynamic memory controller helps to maximize memory interface efficiency, minimize latency and ensure QoS, while minimizing energy consumption," said Keith Clarke, VP Fabric IP, ARM. "ARM is committed to continued innovation in interconnect and peripheral IP to deliver integrated, optimized solutions for SoC backplanes."
About ARM
ARM designs the technology that lies at the heart of advanced digital products, from wireless, networking and consumer entertainment solutions to imaging, automotive, security and storage devices. ARM's comprehensive product offering includes 32-bit RISC microprocessors, graphics processors, enabling software, cell libraries, embedded memories, high-speed connectivity products, peripherals and development tools. Combined with comprehensive design services, training, support and maintenance, and the company's broad Partner community, they provide a total system solution that offers a fast, reliable path to market for leading electronics companies. More information on ARM is available at http://www.arm.com.
ARM and AMBA are registered trademarks of ARM Limited. AXI is a trademark of ARM Limited. All other brands or product names are the property of their respective holders. "ARM" is used to represent ARM Holdings plc; its operating company ARM Limited; and the regional subsidiaries: ARM, Inc.; ARM KK; ARM Korea Ltd.; ARM Taiwan Limited; ARM France SAS; ARM Consulting (Shanghai) Co. Ltd.; ARM Belgium N.V.; AXYS Design Automation Inc.; ARM Germany GmbH; ARM Embedded Technologies Pvt. Ltd.; and ARM Norway, AS.
