ASMgrid

 

Asmgrid blockdiagram

 

 

For meter-to-meter wireless mesh networking, dominant in North America, Accent offers the ASM211. The innovative device is the industry first transceiver to comply with the IEEE 802.15.4g standard supporting required FSK and OFDM high data rate options, for 800 kbps operation and a RX sensitivity of up to -112 dBm at 50 kbps.

 

The system-on-chip solution integrates Accent's programmable SUNFX™-4G modem and robust RF transceiver, ARM® Cortex™-M0 processor with on-chip Flash and SRAM, ROM, as well a number of communication interfaces. The ASM211's highly integrated RF transceiver reduces external part count by incorporating blocks such as a LNA, internal tuning capability, and channel filtering.

 

The innovative SUNFX-4G modem architecture utilizes software flexibility to track 802.15.4g until final standardization and hardware accelerators to reduce computational requirements, hence cost and power.

 

The modem utilizes only a portion of the extremely efficient Cortex M0 processor. The industry-standard ARM architecture simplifies and protects software investment.

 

To increase product robustness during potential field updates, the ASM211 includes a ROM, for kernel protection during firmware upgrades, in addition to the on-chip Flash and SRAM. The device provides a flexible PA interface required to easily support 30 dBm output power required by Smart Meter applications.

 

KEY PRODUCT FEATURES

  • INDUSTRY FIRST TRANSCEIVER SOC SUPPORTING IEEE 802.15.4g PHY WITH OFDM OPTIONS
  • MULTI BAND OPERATION/MULTI RATE:
    • 863MHz to 870MHz (Europe)
    • 902MHz to 928MHz (ISM US)
    • 915MHz to 923.5MHz (Korea)
    • 920MHz Japanese band
    • Data rates up to 800 kbps
  • PROGRAMMABLE SUNFX-4G MODEM AND ROBUST RF TRANSCEIVER
    • Innovative software implementation (utilizing Cortex M0 processor) with Accent accelerator architecture
    • Flexibility for early product inter-operability and vendor customization needs
    • FSK, (G)FSK, OFDM option 1,2,3 across all MCS
    • Bandwidth support from 200kHz to 1.2MHz
    • Highly linear RF transceiver, excellent performance in presence of in/out-of-band interferers
  • ARM CORTEX-M0 SUBSYSTEM
    • Scalable frequency up to 96 MHz and 90 DMIPS
    • Ample performance for additional software functionality and standard tracking
    • 32 KB SRAM, 64 KB Flash (with 1 KB direct mapped cache)
    • 16 KB ROM for boot loading and support robust firmware updates
  • COMMUNICATION INTERFACES AND SYSTEM PERIPHERALS
    • Serial communication: 2 SPI, 4 UART
    • 24 GPIOs
    • Four Timers and Watchdog
    • DMA
    • JTAG debug controller
  • LOW EXTERNAL COMPONENT COUNT
    • Highly integrated RF Transceiver including LNA, internal tuning capability, and channel filtering
    • Flexible system support for external PA

 

 

KEY PRODUCT SPECIFICATIONS

  • INDUSTRY LEADING PERFORMANCE
    • FSK data rate 50-200 kbps
    • FSK RX sensitivity
      • 50 kbps -101 dBm
    • OFDM RX sensitivity
      • 50 kbps -112 dBm
      • 800 kbps-101 dBm
    • Output Power +0 dBm
    • Standby Power2 mA
  • Operating Conditions
    • Temperature range -40°C to 85°C
    • Voltage 2.4 – 3.6 V
      (optional dual support 1.8/3.3 V)
  • PACKAGE 56QFN