BK7258QN6855

Key features

• Compliant with IEEE 802.11b/g/n/ax 1x1 standard
• Supports 20 MHz/40 MHz channel bandwidth in the 2.4 GHz band
• Supports 802.11ax with up to MCS9 on 20 MHz and 40 MHz channels
• Supports MCS 32 HT duplicate mode
• Supports antenna diversity to combat multipath fading and improve reception performance
• Supports Dual Carrier Modulation (DCM) for improved signal reliability and coverage
• Supports CSI-based Wi-Fi sensing
• Supports 802.11mc precise indoor positioning
• Supports downlink MU-MIMO
• Supports OFDMA
• Supports Target Wake Time (TWT)
• Supports transmit and receive LDPC for extended communication range
• Supports WPA™/WPA2™/WPA3™-Personal for enhanced security
• Supports Station (STA), SoftAP, and Wi-Fi Direct (P2P) modes
• Supports SoftAP and STA concurrent mode
• Integrated Bluetooth/Wi-Fi coexistence (PTA)
• Transmit power up to approximately 20 dBm
• Receive sensitivity -98 dBm
• Compliant with dual-mode Bluetooth 5.4 standard
• (BK7258QN88617 and BK7258QN6868 only) Dedicated low-power Bluetooth transceiver
• Supports BR, EDR 2 Mbps and 3 Mbps, LE 1 Mbps, 2 Mbps, and Long Range (125 kbps and 500 kbps)
• Supported Bluetooth LE features: LE Audio, Angle of Arrival (AoA) and Angle of Departure (AoD) direction finding, 2 Mbps, extended advertising, and long-range communication
• Antenna array supporting up to 16 antennas for precise positioning
• Arm®v8-M STAR-MC1 MCU, up to 480 MHz
• Double-precision FPU
• 16 KB ITCM + 16 KB DTCM
• Embedded TrustZone® security
• DSP instructions with SIMD support
• Performance up to 3.84 CoreMark®/MHz
• Supports UART flash download
• Supports SWD interface
• Flash (XIP): SiP flash up to 8 MB, external flash up to 16 MB
• SiP PSRAM: up to 16 MB
• Flash/PSRAM expansion: up to 4 GB via QSPI
• 640 KB shared SRAM
• 64 KB ROM
• eFuse
• External oscillators: 26 MHz crystal oscillator (XTALH), 32 kHz crystal oscillator (XTALL)
• Internal oscillators: 26–360 MHz digitally controlled oscillator (DCO), 32 kHz ring oscillator (ROSC)
• 320 MHz/480 MHz DPLL
• Audio PLL (APLL)
• 2.5 to 4.35 V battery voltage (VBAT) supply
• On-chip POR and brown-out detector (BOD)
• Embedded DC-DC converter and LDO
• Low power: Wi-Fi active mode RX current 17.5 mA; Bluetooth LE active mode RX current 12 mA (BK7258QN88617 and BK7258QN6868 only); Bluetooth LE active mode TX current 19 mA (BK7258QN88617 and BK7258QN6868 only); sleep mode current 43 μA; deep sleep mode current 16 μA; power-off mode current 2.5 μA
• GPIO count: 56 for QFN88 package, 46 for BK7258QN6854 QFN68 package, 40 for BK7258QN6855 QFN68 package, 38 for BK7258QN6868 QFN68 package
• 2× SPI
• 2× QSPI
• 3× UART, 1 with hardware flow control and flash download support
• 1× Smart Card controller (SC)
• 1× SDIO interface
• 2× I2C
• 1× High-Speed USB 2.0 (HS) controller
• 1× CAN controller with CAN FD support
• 1× LIN controller
• 2× GDMA controllers, 8 channels each
• 1× 2D-DMA (DMA2D) controller
• 1× Rotation module (ROTT)
• 2× Scaling modules (SCALE)
• 1× Display controller (DISPLAY) with RGB and 8080 interface support
• 1× Segment LCD (SLCD) controller, up to 8×28 segments
• 1× JPEG hardware encoder
• 1× JPEG hardware decoder