The BK3633 chip is a highly integrated wireless system on chip, which supports Bluetooth Low Energy 5.2, classic Bluetooth 2.1 and proprietary 2.4 GHz protocols. It integrates a high-performance RF transceiver,
baseband,  low  power  processor,  rich  feature  peripheral  units,programmable protocol and profile to support a wide range of applications. The Flash program memory makes it suitable for customized applications.

The BK3633 is designed with advanced technology process and integrated with switch DCDC regulator, that it has ultra-low power consumption and ultra-low leakage power. The embedded high order interference
suppression filter and fast automatic gain control logic make it work well in high interference environment.

Bluetooth low energy 5.2, classic 2.1 and proprietary 2.4 GHz protocol
Around 5 mA full operation current
Less than 1 uA deep sleep current with low power running timer
Bluetooth 5.1 standard Angle of Arrival and Angle of Departure
Maximum sixteen antenna array for precise in-door positioning
Bluetooth Low Energy 125 kbps, 500kbps, 1Mbps and 2Mbps
Classic Bluetooth 1 Mbps
Proprietary 2.4 GHz 1Mbps and 2 Mbps
High output power up to 20 dBm and Bluetooth LE Power Control-105 dBm sensitivity in 125 kbps Bluetooth low energy mode
32-bit RISC Core with 80 KB data memory and up to 80 MHz speed
Operation voltage from 0.9 V to 5.75 V
Clock
16 MHz crystal reference clock with internal tuning load capacitance
80 MHz digital PLL clock
32 kHz ring oscillator
External 32KHz crystal oscillator
MCU can run with any clock source with internal frequency divider
Dedicate audio PLL clock for I2S main clock
Interface and peripheral units
Quad IO FLASH programming
I2C, SPI interface up to 96 MHz
Two UART interface and UART download
Multi-channels high resolution 32 bit PWM with capture mode
USB Host and Device interface, with USB audio capability
IrDA receiver and transmitter amplify
On-chip high accurate temperature sensor
On-chip 10 bit general ADC
GPIO with multiplexed interface functions
True random number generator
I2S/PCM digital audio interface with master and slave mode
High quality high speed and low power clock output
Code encryption and online decryption
Secure JTAG and system protection
Typical Package Type
32-pin QFN 4x4, 40-pin QFN5x5 and 48-pin QFN6x6