QN9021/DY RF/IF and RFID

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1. Description

QN9021/DY is an ultra low power, high performance and highly integrated Bluetooth LE solution. It is used in Bluetooth Smart applications such as sports and fitness, human interface devices, and app enabled smart accessories. It is specially designed for wearable electronics and can run on a small capacity battery such as a coin cell battery. QN902x integrates a Bluetooth LE radio, controller, protocol stack and profile software on a single chip, providing a flexible and easy to use Bluetooth LE SoC solution. It also has a high performance MCU and an on-chip memory that can support users to develop a single-chip wireless MCU solution. Users can also utilize QN902x as a network processor by connecting to an application processor for more advanced applications. Additional system features include fully integrated DC-to-DC converter and LDO, low-power sleep timer, battery monitor, general-purpose ADC, and GPIOs. These features reduce overall system cost and size. QN902x has very low power consumption in all modes. It enables long life in battery-operated systems while maintaining excellent RF performance. QN9020/1 operates with a power supply range of 2.4 V to 3.6 V. The QN9022 operates with a power supply range of 1.8 V to 3.6 V.

2. Features

    1. True single-chip Bluetooth LE SoC solution

        - Integrated Bluetooth LE radio

        - Complete Bluetooth LE protocol stack and application profiles

        - Supports both master and slave modes

        - Supports secure connections

        - Up to eight simultaneous links in master mode

        - Frequency bands: 2400 MHz to 2483.5 MHz

        - 1 Mbit/s on air data rate and 250 kHz deviation

        - GFSK modulation format

    2. RF

        - -95 dBm RX sensitivity (non-DC-to-DC mode)

        - -93 dBm RX sensitivity (DC-to-DC mode)

        - TX output power from -20 dBm to +4 dBm

        - Fast and reliable RSSI and channel quality indication

        - Compatible with worldwide radio frequency regulations

        - Excellent link budget up to 99 dB

    3. Very low power consumption

        - Single power supply of 2.4 V to 3.6 V for QN9020/1

        - Single power supply of 1.8 V to 3.6 V for QN9022

        - Integrated DC-to-DC converter and LDO

        - 2 µA deep sleep mode

        - 3 µA sleep mode (32 kHz RC oscillator on)

        - 9.25 mA RX current with DC-to-DC converter

        - 8.8 mA TX current @0 dBm TX power with DC-to-DC converter

    4. Compact 6 mm × 6 mm HVQFN48 package for QN9020, 5 mm × 5 mm HVQFN32 package for QN9021, and 5 mm × 5 mm HVQFN40 package for QN9022

    5. Microcontroller

        - Integrated 32-bit ARM Cortex-M0 MCU

        - 64 kB system memory

        - 96 kB ROM

        - 128 kB on-chip flash memory with 4 kB page size for QN9020 and QN9021

        - User-controllable code protection

    6. High-level integration

        - 4-channel, 10-bit general-purpose ADC

        - Two general-purpose analog comparators

        - 31 GPIO pins for QN9020, 15 GPIO pins for QN9021, and 22 GPIO pins for QN9022

        - GPIO pins can be used as interrupt sources

        - Four general-purpose timers 

        - 32 kHz sleep timer

        - Watchdog timer

        - Real-time clock with calibration

        - 2-channel programmable PWM

        - Two SPI/UART interfaces

        - I2C-bus master/slave interface

        - Brownout detector

        - Battery monitor

        - AES-128 security coprocessor

        - 16 MHz or 32 MHz crystal oscillator

        - Low power 32 kHz RC oscillator

        - 32.768 kHz crystal oscillator

3. Applications

    1. Sports and fitness

    2. Healthcare and medical

    3. Remote control

    4. Smartphone accessories

    5. PC peripherals (mouse and keyboard)

    6. Wireless sensor networks

4. Pin configuration

5. Function Description

The QN9021/DY integrates an ultra-low power 2.4 GHz radio, qualified software stack and application profile on a single chip. An integrated power management unit (PMU) controls the operation of the system in different power states to ensure low-power operation. The high-frequency crystal oscillator provides the reference frequency for the radio transceiver, while the low-frequency oscillator keeps time in the sleep state. The integrated AES coprocessor supports encryption with minimal MCU usage. Minimal MCU usage helps reduce MCU load and reduce power consumption. The embedded MCU and additional memory provide additional signal processing capabilities and help run user applications. The QN9021/DY includes a general purpose ADC with four external independent input channels. ADC is used for supply voltage monitoring. Integrated digital serial interface (SPI/UART/I2C) for communication with application processor or digital sensor. The UART supports Bluetooth LE Direct Test Mode (DTM). This interface is used to control the PHY layer with commercially available Bluetooth testers for qualification. The I2C bus is integrated and supports master-slave mode. It can communicate with digital sensors or EEPROM.

6. The MCU subsystem includes

    1. 32-bit ARM Cortex-M0 MCU

    2. 64 kB system memory

    3. Reset generation

    4. Clock and Power Management Unit

    5. Nested Vectored Interrupt Controller (NVIC)

    6. Serial Wire Debug (SWD) interface