BK7236 WiFi6 SoC from Beken

Brief

The BK7236 is a highly-integrated 1x1 single-band 2.4 GHz Wi-Fi 6 (802.11b/g/n/ax) and Bluetooth 5.4 combo solution designed for applications that require high security and abundant resources. The integration of dual-core 32-bit ARMv8-M Star M33 MCU and comprehensive set of peripherals makes the BK7236 ideal for advanced Internet of Things (IoT) applications.

The BK7236 provides state-of-the-art security based on a powerful security architecture. The BK7236 integrates a IoT Platform Security Suite (IPSS) for cryptograph and system security control. The IPSS embeds all-round and robust security features to set up a top-secret execution environment for IoT devices.

Using advanced design techniques and ultra-low-power process technology, the BK7236 delivers high integration, efficient security and minimal power consumption for a wide range of complex IoT applications.

Key Features

WiFi

• IEEE 802.11b/g/n/ax 1x1 compliant • 20/40 MHz channel bandwidth for 2.4 GHz • Supports downlink Multi-User Multiple-Input Multiple-Output (DL MU-MIMO) • Supports uplink Orthogonal Frequency Division Multiple Access (UL OFDMA) • Supports individual Target Wake Time (iTWT) • TX and RX low-density parity check (LDPC) support for extended range • WPA/WPA2/WPA3-Personal support for enhanced security • Working mode: STA, soft AP, Direct • Concurrent AP + STA • Integrated Bluetooth/WLAN coexistence (PTA) • TX power up to +21 dBm • RX sensitivity -99 dBm

BLE

• Dual-mode Bluetooth 5.4 compliant • Supports Basic Rate (BR), Enhanced Data Rate (EDR) 2 Mbps and 3 Mbps, Low Energy (LE) 1 Mbps, 2 Mbps, and long range (125 kbps and 500 kbps) • Advertising extensions • Bluetooth direction finding: Angle of Arrival (AoA) and Angle of Departure (AoD) • Supports an antenna array with up to sixteen antennae for precise indoor positioning

Core

• Dual-core ARMv8-M Star M33 MCU:

  • One low power 120 MHz and one high performance 320 MHz
  • Each core features a double-precision floating point unit (FPU)
  • Each core has 16 K ITCM + 16 K DTCM
  • Each core embeds TrustZone
  • Each core supports DSP instructions with SIMD • EEMBC CoreMark® score: 3.84 CoreMark/MHz • SPI/UART for Flash download • Serial wire debug (SWD) interface

Memory

• SiP Flash: 4 MB or 8 MB • SiP PSRAM: 4 MB or none • 512 KB Share SRAM • 128 KB ROM • 32-bit eFuse • 32 Kbit PUFrt

Security

The BK7236 integrates the IoT Platform Security Suite (IPSS) for cryptograph and system security control. The key features of the IPSS include:

• Secure boot • Secure debug • Secure connection • Firmware Over-The-Air (FOTA) • Provisioning • TEE_M • TrustEngine, which includes the following features:

  • Symmetric schemes, AES-ECB/CBC/CTR/CBC-MAC/CMAC/CCM/GCM (key size 128-bit, 192-bit and 256-bit)
  • Symmetric schemes, SM4-ECB/CBC/CTR/CBC-MAC/CMAC/CCM/GCM
  • Digest schemes, SHA1/224/256
  • Digest scheme, SM3
  • Asymmetric schemes, RSA 1024/2048/3072/4096 and ECCP 192/224/256/384/512/521
  • Asymmetric scheme, SM2
  • Key ladder for key management
  • Lifecycle management
  • True random number generator

Clock

• External oscillator: 26 MHz crystal oscillator (X26M), 32.768 kHz crystal oscillator (X32K) • Internal oscillator: 32 kHz ring oscillator (ROSC), 26 ~ 240 MHz digitally controlled oscillator (DCO) • 320/480MHz PLL (DPLL)

Power Management

• 1.7 to 5.5 V VBAT supply • On-chip power-on reset (POR) and brown-out detector (BOD) • Embedded buck (DC-DC) converters and LDO regulators • Low power consumption:

  • Active mode RX: 15 mA
  • Low voltage standby mode: 50 μA
  • Deep sleep mode: 5.0 μA
  • Shutdown mode: 1.0 μA

Peripherals

• 20 GPIOs, configurable 3.0 V/5.0 V voltage • 1x SPI • 3x UART, 1 with hardware flow control and flash download support • 1x SD/SDIO • 2x I2C • 1x high-speed USB (HS) • 2x general-purpose DMA controller (GDMA), each with 8 channels • 6x 32-bit PWM • 1x 15-bit SAR ADC, 4 channels • 2x 32-bit general-purpose timer/counter • 2x watchdog • 1x real-time counter (RTC) • 1x temperature sensor • 1x touch sensor

Packaging

• QFN40 package, 5 x 5 mm • Operating temperature range: -40 up to +125 °C

Target Applications

  • Smart appliances
  • Smart plug
  • Smart lighting
  • Door locks

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