了解 Sub-GHz 無線 MCU 技術


適用於低功耗物聯網應用的無線MCU

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產品簡介

VC7xxx系列是一款高度集成的無線MCU,專為物聯網應用設計。 它集成了Cortex-M3 MCU,高性能 sub-GHz 無線,Flash、SRAM 記憶體,各種接口(例如 UART、SPI、I2C、PWM) 與多種輔助功能(例如 ADC、高精度計時器),支持低功耗的省電模式。 嵌入式的 sub-GHz 無線收發器完全符合IEEE802.15.4g/x標準。它集成了高性能 LNA 和 PAs (13dBm or 20dBm) 以實現低功耗和長距離無線連結。 先進的DSP技術確保VC7xxx在同類產品中提供最佳的通信系統性能,例如強大的鏈路預算,極高的ACI抑制率等。

其中VC7000可協助客戶為自己選擇的MCU添加無線連結功能,VC7200為中小型物聯網應用提供網狀網路連接能力和 Open-CPU,而VC7300(相容Wi-SUN FAN1.0)和VC7351(相容Wi-SUN FAN1.1)則支持大規模工業物聯網應用,例如智能電錶。

主要特點

 Best-in-class sub-1GHz RF transceiver compliant to IEEE802.15.4g/x

 ARM Cortex-M3 CPU with embedded flash and SRAM memory

 Support large scale networking (Wi-SUN FAN 1.0 and FAN 1.1)

 Support small-to-medium scale easy networking

 Support real-time applications

 Embedded hardware security accelerator

 Abundant interfaces for versitile IoT appliations

 Low power consumption

MCU 規格與特色

 MCU

  • 32-bit Cortex M3 with maximum 39.3126 MHz clock
  • Single cycle multiplier
  • Standard 2-wires SWD debug port
  • 512/1024 KB Flash with write protect, support both IAP and ISP
  • 128 KB SRAM with parity check and data retention under sleep mode
  • 16 KB SRAM with data retention under deep-sleep mode
  • Support abort exception detection including flash check-sum error, SRAM parity error, memory address error and memory align error
  • Support boot from embedded flash or boot from internal ROM with IO strap option

 Interface Controller

  • Support SPI flash and SPI SRAM for program execution and direct data read/write
  • 4 UART controllers with parity check and transmit/receive FIFOs
  • Each IR channel can be coupled with IR carrier for IR transmission
  • 1 SPI master/slave controller
  • 1 I2C master/slave controller
  • 4 32-bit timers
  • 4 16-bit PWM timers
  • 4-channels DMA controller
  • AES-128/192/256 CODEC
  • ECC encrypt/decrypt accelerated engine
  • Watch dog timers with programmable period
  • Support multiple wake-up sources under each mode
  • Maximum 35 GPIOs
  • 11 GPIOs with external interrupt and wakeup sources
  • Key scan controller supporting up to 16 keys with 4x4 matrix

 Analog Controller

  • 1 Msps 10-bit ADC with 6 external inputs
  • ADC supports manual sample mode or auto sample mode
  • 1 comparator with single end input or differential input
  • Embedded 32 KHz and 39.2166 MHz RCO
  • Support external 32 KHz crystal
  • Support crystal absent detection for 32KHz
  • Each clock can be selected as system clock
  • Support digital clock divider up to 256x
  • Support low voltage detection with programmable level
  • Support power-on reset for both IO voltage and core voltage
  • Support RTC auto-calibration (accuracy: 1 ppm)

無線功能

 Support IEEE 802.15.4g/x, wireless M-Bus

 Support modulation schemes: OOK, 4/(G)FSK, GMSK and OFDM

 Support sub-1GHz bands: 230, 315, 433, 490, 868, 915 MHz

 Excellent selectivity performance

  • Adjacent channel rejection: >48 dB
  • Blocking signal rejection: >75 dB

 Best-in-class receiver sensitivity

  • -109 dBm at 50 kbps

 Maximum data rate: 300 kbps (FSK) and 3.6Mbps (OFDM)

 Configurable maximum transmit output power :

  • HPA output: +20 dBm
  • MPA output: +13 dBm

 Automatic output power ramping

 Automatic RX wake-up for low power listen

 Fast wake-up and AGC for low power listen

 Functions for link robustness:

  • Frequency hopping
  • Auto-acknowledgement
  • Auto-retransmission

 RSSI and clear channel assessment for listen-before-talk

 Support packet over packet reception for reliable communication

 Early reception termination:

  • Receiving error detection
  • Receiver identification filtering

系統特點

 Operating Voltage: 2.0 V ~ 3.6 V

 Package:

  • VC7000: QFN-32 (5 x 5mm)
  • VC7200: QFN-64 (9 x 9mm)
  • VC7300B: QFN-64 (9 x 9mm)
  • VC7351: QFN-68 (8 x 8mm)

 Operation Temperature: -40 ~ +85 °C

 Power consumption of VC7000:

  • RX mode: 18 mA
  • TX mode: 45 mA@+13 dBm, 110 mA@+20 dBm

 Power consumption of SoCs:

  • Sleep mode:
    • VC7200: ~2 uA
    • VC7300B: ~9 uA
  • Deep sleep mode: <1.1 uA

系統框圖

訂購資訊

Part Number Flash RAM Package Body Size(mm)
VC7300AU 512 KB 128 KB QFN-64 9x9
VC7300BU 1 MB 128 KB QFN-64 9x9


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