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GR851x series

The GR851x family is a System-on-Chip (SoC) that integrates a powerful application and security subsystem with NB-IoT cellular communication functionality. It features ultra-low power consumption, high communications reliability, and outstanding application scalability, making it an ideal choice in a vast variety of Internet of Things (IoT) application scenarios including smart meter, asset management, smoke detector and wristband.
Packaging: QFN/BGA

Overview

Based on ARM® Cortex®-M4F CPU core, GR851x integrates an RF transceiver covering both low band (LB) and high band (HB), packaged with programmable Flash memory, RAM, and multiple peripherals. It is prepared to support 3GPP NB-IoT Rel-15.

Part Number
AP
RAM
Flash
Package
Clock Source
Temperature
  • GR8513NMBIN
    Cortex®-M4F 69 MHz
    128 KB
    4 MB
    BGA121L
    26 MHz TCXO or 26 MHz DCXO/THX
    -40°C ~ +85°C
  • GR8513JMNIN
    Cortex®-M4F 69 MHz
    128 KB
    4 MB
    QFN58L
    Only 26 MHz TCXO
    -40°C ~ +85°C
  • GR8513JMNID
    Cortex®-M4F 69 MHz
    128 KB
    4 MB
    QFN58L
    Only 26 MHz DCXO/THX
    -40°C ~ +85°C

Features

  • Application Processor (AP) Sub-System

    • Cortex-M4F based scalable core clock: 3.25 MHz ~ 69.3 MHz
    • AP is independent from CP and is able to reset CP
    • Up to 128 KB SRAM dedicated for OpenCPU application
    • Up to 4 MB Flash with XIP
    • DFOTA
    • Up to 56 GPIOs
    • Low-power UART
    • 2 * I2S, 2 * I2C, 2 * UART, 1 * ISO7816, 2 * SPI, and 1 * QSPI
    • 13-bit ADC
    • 6-channel PWM
    • DMA
    • Timers
    • SWD
  • Power management

    • Wide range voltage input: 1.85 V ~ 4.35 V
    • Highly efficient PMU integration
    • AP and CP decoupled with flexible power modes
    • Power consumption: 35 µA/MHz
    • I/O voltage: 1.6 V ~ 3.6 V
    • Power-saving mode (PSM) , Idle mode
    • Integrated power supply for PA/FEM
    • BOD
  • Communication Processing (CP) Sub-System

    • 3GPP Rel-14 supports:
      • Multi-Carrier support enhancement (NPRACH, Paging)
      • Cat-NB2 and two HARQ processes
      • CP re-establishment
      • AS and NAS release assistance indication
      • Rel-14 positioning: OTDOA and E-CID
      • DL channel quality reporting
    • 3GPP Rel-15 supports:
      • NB-IoT wake-up signal (NWUS)
      • Dedicated PRACH SR
      • SR in HARQ ACK
      • RRC connection release without RLC AM poll
      • Relaxed monitoring for cell reselection
      • Power headroom reporting enhancement
    • Global bands support: 1, 2, 3, 4, 5, 8, 11, 12, 13, 14, 17,18, 20, 25, 26, 28, 66, 70, 71, 74, 85
    • DFOTA
  • Security

    • Complete secure computing engine
      • AES 128-bit/192-bit/256-bit symmetric encryption (ECB, CBC, CTR)
      • Keyed-hash message authentication code (HMAC)
      • TRNG
    • Comprehensive security operation mechanism
      • Root-of-Trust
      • Secure boot
      • Encrypted firmware runs directly from Flash
      • Flexible encrypted key system
  • Packages

    • BGA121L: 5.6 mm * 5.6 mm * 0.88 mm, 0.5 mm pitch
    • QFN58L: 6 mm * 6 mm * 0.75 mm, 0.35 mm pitch, 4-layer PCB supported

System Block Diagram

  • Rich Protocol Set

    1. Protocols supported: IPv4, IPv6, IPv4v6, Non-IP, UDP, TCP, CoAP, LwM2M, MQTT-SN, HTTP(s), FTP, TLS, and DTLS
    2. Cloud clients supported: CMCC/CTC Cloud/CTWing/Alibaba Cloud/Huawei OceanConnect (OC)
    3. Compatible AT Command
  • Rich Tool Set

    1. Easy-to-use software development kit (SDK) 
    2. Easy-to-test/evaluate hardware development kit
    3. Turn-key reference module design
    4. Flash tool
    5. RF calibration and test tool
    6. CP trace tool
    7. High-efficiency mass production tool

GR851x is targeted at a wide range of application scenarios, including smart meter, smoke detector, asset management, smart wristband, smart street lamp, bike sharing, scooter sharing, smart parking, pet tracking, livestock management.

Product Brief

Title
ID
Version
Date
Type
  • GR851x Product Brief
    PB-GR8-00001-EN
    Rev.1.1
    2021-12-14

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