BK7258 SoC: Wi-Fi 6 & Bluetooth 5.4 LE Combo for advanced IoT

Overview

The BK7258 is a highly integrated 1×1 single-band 2.4 GHz Wi-Fi 6 (802.11b/g/n/ax) and Bluetooth 5.4 Low Energy (LE) combo solution designed for applications that require abundant resources and low power consumption. The integration of a 32-bit ARMv8-M Star MCU and a comprehensive set of peripherals makes the BK7258 ideal for advanced Internet of Things (IoT) applications.

Using advanced design techniques and ultra-low power process technology, the BK7258 delivers high integration and minimal power consumption for IP cameras, HMI applications, smart locks, and other advanced 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 Orthogonal Frequency Division Multiple Access (OFDMA)

• Supports Target Wake Time (TWT)

• TX and RX Low-Density Parity Check (LDPC) support for extended range

• WPA/WPA2/WPA3-Personal support for enhanced security

• Operating modes: STA and SoftAP

• Concurrent SoftAP + STA

• Integrated Bluetooth/Wi-Fi coexistence (PTA)

• TX power up to +20 dBm

• RX sensitivity -98 dBm

Bluetooth Low Energy

• Bluetooth 5.4 Low Energy (LE)

• Supports Bluetooth Low Energy 1 Mbps, 2 Mbps, and long range (125 kbps and 500 kbps)

• Supported Bluetooth Low Energy features: LE Audio, Angle of Arrival (AoA) and Angle of Departure (AoD) direction finding, 2 Mbps, advertising extensions, and long range

• Supports an antenna array with up to 16 antennas for precise positioning

Core

• ARMv8-M Star (M33F) MCU at up to 480 MHz:

– Double-precision floating-point unit (FPU)

– 16 KB ITCM + 16 KB DTCM

– Embedded TrustZone

– Supports DSP instructions with SIMD

– 3.84 CoreMark/MHz

• UART flash download

• Serial Wire Debug (SWD) interface

Memory

• Flash up to 16 MB

• PSRAM up to 16 MB

• 640 KB Share SRAM

• 64 KB ROM

• eFuse

Clock Management

• External oscillators: 26 MHz crystal oscillator (XTALH), 32.768 kHz crystal oscillator (XTALL)

• Internal oscillators: 32 kHz ring oscillator (ROSC), 26–360 MHz digitally controlled oscillator (DCO)

• 320/480 MHz PLL (DPLL)

• Audio PLL (APLL)

Power Management

• 2.0 to 4.35 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: 17.5 mA

– Sleep mode: 43 μA

– Deep sleep mode: 16 μA

– Shutdown mode: 2.5 μA

Peripherals

• 56 GPIOs

• 2x SPI

• 2x QSPI

• 3x UART: 1 with hardware flow control and flash download support

• 1x Smart Card controller

• 1x SDIO

• 2x I2C

• 1x high-speed USB2.0 (HS)

• 1x CAN controller with CAN FD

• 1x LIN controller

• 2x general-purpose DMA controller (GDMA), each with 8 channels

• 1x DMA2D controller

• 1x rotation module

• 2x scaling module

• 1x display controller supporting RGB and 8080 interfaces

• 1x segment LCD controller for up to 8 x 28 segments

• 1x JPEG hardware encoder

• 1x JPEG hardware decoder

• 1x 8-bit CIS DVP interface

• 1x 720p H.264 video encoder

• 1x Ethernet MAC interface

• 12x 32-bit PWM channel

• 3x I2S

• 1x four-band digital hardware equalizer

• 2x audio ADC

• 1x audio DAC

• 1x DMIC

• 1x SBC accelerator

• 12-bit AUX ADC, up to 11 channels

• 6x 32-bit general-purpose timer

• 2x watchdog timer

• 1x real-time counter (RTC)

• 1x IrDA

• 1x temperature sensor

• 1x touch sensor, up to 16 touch sensing I/Os

Packaging

• QFN88 package, 9 x 9 mm

For documentation and help, refer to our Knowledge Base section

Beken is the official brand name of Bekencorp.