The industry is shifting toward more intelligent home applications. Instead of relying on the cloud, BK7258 enables real-time autonomy through a unified silicon architecture that integrates compute, connectivity, AI acceleration, and multimedia processing on a single die.

 

By consolidating multiple subsystems into one platform, developers can reduce system complexity, save PCB space, and accelerate time-to-market with a cohesive Edge AI MCU.

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High-Performance Edge Compute

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The BK7258 integrates a powerful compute subsystem designed for advanced IoT applications:

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• Arm v8-M STAR-MC1 MCU running at up to 480 MHz

• Double-precision Floating-Point Unit (FPU) and DSP instructions with SIMD support

• 3.84 CoreMark/MHz for efficient processing performance

• Extensive Memory: Up to 8 MB SiP Flash (16 MB external) and up to 16 MB SiP PSRAM

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Unified Connectivity and Wireless Performance

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The BK7258 combines advanced wireless technologies into a single integrated solution:

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• Wi-Fi 6 (802.11b/g/n/ax) 1x1 2.4 GHz with 20/40 MHz bandwidth.

• Dual-mode Bluetooth 5.4 compliant

• Dedicated Low-Power BT Transceiver (available in BK7258QN88617 and BK7258QN6868)

• Integrated Coexistence (PTA) to ensure stable simultaneous Wi-Fi and Bluetooth connectivity

• Strong Performance: RX sensitivity of -98 dBm and TX power up to +20 dBm

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Graphics, Vision, and Multimedia Acceleration

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The BK7258 features a comprehensive multimedia pipeline for rich user experiences:

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• Video Encoding/Decoding: Hardware H.264 video encoder (up to 720p @ 30 fps) and JPEG encoder/decoder

• Display Controller: Supports RGB and 8080 interfaces for LCD panels

• Image Processing: 2D DMA (DMA2D) for graphical acceleration and a Rotation Module (ROTT)

• Camera Interface: 8-bit CIS DVP interface for CMOS image sensors.

• Audio Suite: Features a four-band digital hardware equalizer, dual audio ADCs, and a mono DAC

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Local-First Security and Privacy

 

Edge devices must be intelligent and secure. The BK7258 integrates hardware-level protection:

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• Arm TrustZone embedded secure architecture

• eFuse for secure storage and identity

• Local Processing: High-speed on-chip processing of vision and voice data reduces reliance on cloud transfers

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Performance Designed for the Edge

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The BK7258 is engineered for minimal power consumption in demanding environments:

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• Deep Sleep Mode: 16 μA

• Shutdown Mode: 2.5 μA

• Active RX: 17.5 mA (Wi-Fi) / 12 mA (Low-power BT)

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Example Applications

• HMI (Human Machine Interface): Control panels and touchless interfaces

• Smart Home: Visual doorbells, door cameras, and smart locks

• Appliances: Smart refrigerators, washing machines, and air conditioners

• Industrial: Factory automation sensors, terminals, and smart meters

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Why BK7258?

Traditional architectures required separate MCUs, video processors, and wireless chips. The BK7258 consolidates these into a single hub, allowing developers to eliminate hardware complexity and focus on building intelligent, responsive experiences for the next generation of IoT terminals.