With the increasing trend towards multicore eSi-RISC designs such as dual core secure processor applications and Posedge’s innovative 7-core Residential and SMB Gateway, the eSi-RISC development Suite v2.5 now provides JTAG debug and control over all processors in the JTAG chain. In addition, optional load locked and store conditional instructions have been added to the instruction set to support multicore systems.
Compiler performance has also been enhanced with the provision of Link Time Optimization (LTO) support which can improve code density by between 10% and 15% through expanding the scope of inter-procedural optimizations to encompass the whole program. This has been achieved by upgrading the optimizing C/C++ compiler to GNU GCC version 4.6.1. Additionally, benchmarking the eSi-3250 32-bit processor core using the embedded processor CoreMark benchmark, which is rapidly replacing the traditional Dhrystone MIPS benchmark, shows it performs well, delivering 2.359 CoreMark/MHz.
An approximate power reduction of 15% has been achieved with the inclusion of improved clock gating and operand isolation optimization in the RTL. This makes the eSi-1600 16-bit processor core an extremely viable ultra low-power alternative to 32-bit CPU or legacy 8-bit architectures (such as the 8051) and ideally suited for mixed signal applications.
The eSi-RISC Development Suite v2.5 also incorporates new peripherals including an AMBA AHB compatible static memory interface for external Flash and SRAM memory, AMBA AHB DMA Engine, AMBA APB I2C Slave and AMBA APB Smart Card interface supporting ISO-7816 standard. These have been added to the current eSi-Connect portfolio which already includes SPI, UART USB, I2C Master, Ethernet MAC, RTC and Timer peripherals.
Support for Linux is also now provided with the latest port of the GCC, GDB Debugger and GNU binary tools. Additional software examples and documentation have also been included to speed up evaluation and development. New application examples include a port of FreeRTOS , LwIP TCP/IP Stack and web server as well as SPI Memory and CFI Flash programmer.
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