What chip is em357? Silabs' EM35x series is a high-performance ZigBee/802.15.4 system-on-chip (SoC) based on the ARM Cortex-M3 core with integrated 2.4GHz IEEE 802.15.4 wireless transceiver and 32-bit microprocessor. Flash and RAM and powerful hardware that supports network-level debugging. Mainly used in smart energy, home automation, industrial automation, building automation, lighting control, and safety monitoring and automation (SMA).
The EM35x and EM358xEmber ZigBee chips are based on the ARM Cortex-M3, the industry-leading ZigBee SoC family with high performance, power and code density in a compact package. The EM35x and EM358x series incorporate a 2.4GHz IEEE 802.15.4 RF transceiver with 32-bit microprocessor, flash and RAM, and powerful hardware to support network-level debugging. It combines the powerful ecosystem of ARM tools with devices and tools that enable OEMs to streamline development and speed time to market.
EM357 block diagram
The EM35x and EM358xSoC, tightly integrated with EmberZNet PRO, are ZigBee-compatible mesh networking software and are the popular ZigBee platform on the market.
The EM351 and EM357 are fully integrated system-on-a-chips that integrate a 2.4GHz, IEEE 802. 15.4-2003 standard transceiver, 32-bit ARM Cortex-M3 microprocessor, flash and RAM memory, and ZigBee-based design. The peripheral system used by the division.
Its transceivers use an efficient architecture (out of the IEEE802.15.4-2003 standard dynamic range requirement of 15dB). Its integrated receive channel filtering can coexist with other communication standards in the 2.4 GHz spectrum, such as IEEE 802.11-2007 and Bluetooth, which integrates a voltage regulator, VCO, loop filter and power amplifier to reduce the number of external components. Its optional high-performance wireless mode (enhanced mode) is software selectable to increase dynamic range.
The M3 microprocessor is highly optimized for high performance, low power consumption, and efficient memory utilization. It includes an integrated MPU that supports two different modes of operation (user mode, privileged mode). Its architecture allows the network protocol stack to be separated from the application code and prevents harmful corrections that limit memory and register areas, thereby increasing the stability and reliability of the solution.
The EM351 has 128KB of embedded flash and the EM357 has 192KB of embedded flash. Both chips have 12KB of integrated RAM for data and program storage. The EM35x Ember software optimizes the life of embedded flash with an effective wear-leveling algorithm.
To meet the stringent timing requirements of the ZigBee and IEEE 802.15.4 standards, the EM35x integrates many MAC functions, the AES128 crypto accelerator, and an automatic CRC for hardware processing. The MAC hardware automatically handles the transmission and reception of ACKs, automatically compensates for delays, and clears the transmit channel assessment, as well as automatically filtering received packets. Its Ember packet tracking interface also integrates the MAC, which can be used for non-intrusive capture of all packets (in and out of the EM35x) using the Ember development tool.
The EM35x offers many advanced power management features that extend battery life. Its high-frequency internal RC oscillator allows the processor core to quickly begin executing code on wake-up. It also has a variety of deep sleep modes (less than 1μA of power while retaining RAM content). To support user-defined applications, on-chip peripherals include: UART, SPI, TWI, ADC, and general-purpose timers, as well as up to 24 GPIOs. In addition, there is an integrated voltage regulator, power-on reset circuit, and sleep timer.
The EM35x integrates standard ARM system debug components: Flash Patch and Breakpoint (FPB), Data Watchpoint and Trace (DWT), and Instrument Trace Macrocell (ITM). The EM35x uses standard serial and JTAG interfaces for powerful software debugging and ARM Cortex programming. The EM358x/ EM35x chips can be designed in low-cost, system-wide (SoC) devices, low-power sensors and other home devices, or large-application microprocessors, network co-processors (NCPs). Equipment, more complex applications.
EM357 application circuit diagram
• 32-bit ARM Cortex-M3 processor
• 2.4GHz IEEE802.15.4 transceiver and lower MAC
• 128KB or 192KB flash with optional read protection
• 12KB RAM memory
• AES128 crypto accelerator
• Flexible ADC, UART/SPI/TWI serial communication and general purpose timer
• 24 highly configurable GPIO and Schmitt Trigger inputs
ARM Cortex-M3 processor
• Leading 32-bit processing performance
• Highly efficient Thumb-2 instruction set
• 6MHz, 12MHz or 24MHz operation
• Flexible nested vector interrupt controller for low power, advanced management
• RX current (W/CPU): 26mA
• TX current (W/CPU, +3dBm TX): 31mA
• Low deep sleep current with reserved RAM and GPIO: 400nA no /800nA sleep timer
• Low frequency internal RC oscillator, low power sleep timing
• High frequency internal RC oscillator for fast (110μs) processor startup (from sleep) excellent RF performance
• Link budget in normal mode, up to 103dB; configurable up to 110dB
• -100dBm normal receiving sensitivity; configurable to -102dBm (1% each, 20 bytes packet)
• +3dB output power in normal mode; up to 8dBm configurable
• Powerful Wi-Fi and Bluetooth coexistence for innovative network and processor debugging
• Packet tracking port for non-intrusive packet tracking (Ember development tools)
• Serial line / JTAG interface
• Standard ARM debugging features: Flash patching and Breakpoint; data watchpoints and traces; instrument trace macrocells
Application flexibility• Single voltage operation: 2.1V~3.6V, internal 1.8V and 1.25V regulator
• Optional 32.768kHz crystal for higher precision timers
• Single 24MHz crystal oscillator - low external component count
• Support for external power amplifiers
• As small as 7mm & TImes; 7mm 48-pin QFN package
EM351/EM357 application• Smart energy
• Home automation
• Security Monitoring and Automation (SMA)
• Lighting control
• Building automation
•automated industry
Ember EM35xx development boardThe EM35xx family of development kit development boards has three main hardware components:
• EM35xx breakout board
• EM35xx module
• Debugging Adapter (ISA3)
The EM35xx series development kit also includes the following components:
• US to international AC power plug adapter kit
• Power over Ethernet (PoE) switch
• USB power adapter
• Other cables (USB, DEI, packet tracking port, and RF coaxial)
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