آر اف (فرکانس رادیویی) و بی‌سیم آی سی‌ فرستنده‌گیرنده آر اف

Product Attributes

Introduction

The Ember EM358x is a fully integrated System-on-Chip that integrates a 2.4 GHz, IEEE 802.15.4-2003-compliant transceiver, 32-bit ARM CortexTM-M3 microprocessor, flash and RAM memory, and peripherals of use to designers of ZigBee-based systems. The transceiver uses an efficient architecture that exceeds the dynamic range requirements imposed by the IEEE 802.15.4-2003 standard by over 15 dB. The integrated receive channel filtering allows for robust co-existence with other communication standards in the 2.4 GHz spectrum, such as IEEE 802.11-2007 and Bluetooth. The integrated regulator, VCO, loop filter, and power amplifier keep the external component count low. An optional high performance radio mode (boost mode) is software-selectable to boost dynamic range. The integrated 32-bit ARM CortexTM-M3 microprocessor is highly optimized for high performance, low power consumption, and efficient memory utilization. Including an integrated MPU, it supports two different modes of operation—privileged mode and user mode. This architecture could allow for separation of the networking stack from the application code, and prevents unwanted modification of restricted areas of memory and registers resulting in increased stability and reliability of deployed solutions. The EM358x has either 256 or 512 kB of embedded flash memory and either 32 or 64 kB of integrated RAM for data and program storage. The Ember software for the EM358x employs an effective wear-leveling algorithm that optimizes the lifetime of the embedded flash. To maintain the strict timing requirements imposed by the ZigBee and IEEE 802.15.4-2003 standards, the EM358x integrates a number of MAC functions, AES128 encryption accelerator, and automatic CRC handling into the hardware. The MAC hardware handles automatic ACK transmission and reception, automatic backoff delay, and clear channel assessment for transmission, as well as automatic filtering of received packets. The Ember Packet Trace Interface is also integrated with the MAC, allowing complete, non-intrusive capture of all packets to and from the EM358x with Ember development tools. The EM358x offers a number of advanced power management features that enable long battery life. A highfrequency internal RC oscillator allows the processor core to begin code execution quickly upon waking. Various deep sleep modes are available with less than 2 μA power consumption while retaining RAM contents. To support user-defined applications, on-chip peripherals include optional USB, UART, SPI, TWI, ADC, and general-purpose timers, as well as up to 24 GPIOs. Additionally, an integrated voltage regulator, power-on-reset circuit, and sleep timer are available. Finally, the EM358x utilizes standard Serial Wire and JTAG interfaces for powerful software debugging and programming of the ARM CortexTM-M3 core. The EM358x integrates the standard ARM system debug components: Flash Patch and Breakpoint (FPB), Data Watchpoint and Trace (DWT), and Instrumentation Trace Macrocell (ITM) as well as the advanced Embedded Trace Macrocell (ETM).

Features

• 32-bit ARM Cortex -M3 processor
• 2.4 GHz IEEE 802.15.4-2003 transceiver & lower MAC
• 256 or 512 kB flash, with optional read protection
• 32 or 64 KB RAM memory
• AES128 encryption accelerator
• Flexible ADC, UART/SPI/TWI serial communications, and general purpose timers
• Optional USB serial communications
• 24 highly configurable GPIOs with Schmitt trigger inputs
• Leading 32-bit processing performance
• Highly efficient Thumb-2 instruction set
• Operation at 6, 12, or 24 MHz
• Flexible Nested Vectored Interrupt Controller
• RX Current (w/ CPU): 27 mA
• TX Current (w/ CPU, +3 dBm TX): 31 mA
• Low deep sleep current, with retained RAM and GPIO: 1.0 μA without/ 7.25 μA with sleep timer
• Low-frequency internal RC oscillator for low-power sleep timing
• High-frequency internal RC oscillator for fast (110 μs) processor start-up from sleep
• Normal mode link budget up to 103 dB; configurable up to 110 dB
• –100 dBm normal RX sensitivity; configurable to –102 dBm (1% PER, 20 byte packet)
• +3 dB normal mode output power; configurable up to +8 dBm
• Robust Wi-Fi and Bluetooth coexistence
• Packet Trace Port for non-intrusive packet trace with Ember development tools
• Serial Wire/JTAG interface
• Standard ARM debug capabilities: Flash Patch & Breakpoint; Data Watchpoint & Trace; Instrumentation Trace Macrocell
• Single voltage operation: 2.1–3.6 V with internal 1.8 and 1.25 V regulators
• Optional 32.768 kHz crystal for higher timer accuracy
• Low external component count with single 24 MHz crystal
• Support for external power amplifier
• Small 7×7 mm 48-pin QFN package

Applications

• Smart Energy
• Building automation and control
• Home automation and control
• Security and monitoring
• General ZigBee wireless sensor networking