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Overview

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The BK7231U is a 2.4 GHz 802.11n and Bluetooth 4.2 Low Energy (LE) full-featured combo chip with multimedia capabilities. It integrates hardware and software components required for a complete 802.11b/g/n application, supports concurrent SoftAP + STA mode, and integrates a Bluetooth LE 4.2 transceiver and protocol stack. The 120 MHz MCU and embedded 256 KB RAM enable it to support multiple cloud links and make it ideal for image applications.

Features

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• IEEE 802.11 b/g/n 1x1 compliant

• Up to 17 dBm output power

• Wideband and narrowband interference detection and alleviation

• 20/40 MHz bandwidth and STBC

• Operating modes: STA and SoftAP

• Concurrent SoftAP + STA

• Bluetooth 4.2 Low Energy with -96 dBm sensitivity and 20 dBm output power

• Classic Bluetooth co-existence (PTA)

• MCU up to 120 MHz

• 256 KB internal data RAM

• QSPI for RAM and Flash extension

• QSPI RAM direct mapping to data RAM space

• Multiplexing program download interface and JTAG interface

• 1x 50 MHz SDIO

• 1x SPI

• 2x I2C

• 2x high-speed UART, one with flow control

• 1x full-speed USB

• 1x I2S

• 6x 32-bit general-purpose timer

• 1x AON timer

• 6x 32-bit PWM with either high-speed clock or low-power clock

• 1x ADC of high-speed 10-bit resolution or low-speed 16-bit resolution with an internal decimation filter

• 8-bit CMOS image sensor DVP

• VGA Motion JPEG hardware encoder and dedicated DMA

• 32-byte eFuse

• True random number generator (TRNG)

• 26 MHz and 32 kHz clock signal output