Overview

The BK7256 is a highly integrated 1×1 single-band 2.4GHz Wi-Fi6 (802.11b/g/n/ax) and Bluetooth 5.2 combo solution designed for applications requiring high security and rich resources, making it ideal for advanced Internet of Things (IoT) applications.

The BK7256 provides state-of-the-art security based on a powerful security architecture. It offers an isolated and immutable platform root of trust to provide security services, such as secure boot and cryptographic operations, to applications running on a non-secure processing environment.

Using advanced design techniques and ultra-low-power process technology, the BK7256 delivers high integration and minimal power consumption for smart lighting, smart home, and other complex IoT applications.

Features

Wi-Fi
• IEEE 802.11b/g/n/ax 1×1 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, AP, Direct
• Concurrent AP + STA
• Integrated BT/WLAN coexistence (PTA)
• TX power up to +18 dBm
• RX sensitivity -99 dBm

Bluetooth

Core and Memory
• Dual 32-bit RISC-V MCUs at up to 320 MHz:
– Each core features a double-precision floating point unit (FPU)
– Each core has 32 K ITCM+32K DTCM+64K ICache+16K DCache
– Each core includes a memory protection unit (MPU)
– Each core supports DSP instructions
• EEMBC CoreMark® score: 1 core at 320 MHz: 3.57 CoreMark/MHz
• 4 MB SiP Flash
• 8 MB SiP PSRAM
• 512 KB Share SRAM
• 64 KB ROM
• 32-byte eFuse
• 8 Kbit OTP
• JTAG/UART for download and debug

• SPI flash download

Security
• Isolated secure element and hardware cryptography
• Secure boot
• Unique ID and secure storage
• Secure update and anti-rollback
• Lifecycle management such as secure debug
• Flash encryption
• Cryptographic hardware acceleration:
– Crypto accelerator: DES, AES-128/192/256, ChaCha20-128/256, SM4-128
– Public key accelerator: ECDSA-P256/P384, RSA-2048/3072, SM2
– Hash: SHA-224/256, SHA-384/512, HMAC, Poly1305, SM3-512

– True Random Number Generator (TRNG)

Clock Management
• 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)

• Audio PLL (APLL)

Power Management
• 2.7 to 5.0 V VBAT supply
• On-chip power-on reset (POR) and brown-out detector (BOD)
• Embedded buck (DC-DC) converter and LDO regulators
• Low power consumption:
– Active mode RX: 63 mA
– Active mode TX: 250 mA
– Low voltage standby mode: 150 μA
– Deep sleep mode: 15 μA

– Shutdown mode: 2.0 μA

Peripherals
• 48 GPIOs
• 2x SPI
• 1x QSPI
• 3x UART: 1 with hardware flow control, 1 with flash download support
• 1x SD/SDIO
• 2x I2C
• 1x full-speed USB OTG (FS)
• 1x CAN controller with CAN FD
• 1x general-purpose DMA controller (GDMA) with 6 channels
• 1x DMA2D controller
• 1x LCD interface (16-bit parallel RGB and I8080)
• 1x JPEG hardware encoder/decoder
• 1x 8-bit CIS DVP camera interface
• Up to 12x 32-bit PWM
• 1x I2S
• 1x audio ADC
• 1x audio DAC
• Four-band digital hardware equalizer
• SBC accelerator
• 13-bit SAR ADC, up to 8 channels
• 6x 32-bit general-purpose timer/counter
• 2x watchdog timer
• 1x real-time counter (RTC)
• 1x IrDA
• 1x temperature sensor

• Up to 16x touch sensor

Packaging
• QFN68 package, 8 x 8 mm
• Operating temperature range: -40 up to +125°C

For documentation and help, refer to our Knowledge Base section

Beken is the official brand name of Bekencorp.