Description and Features

The 8253 supports Bluetooth Low Energy ( up to Bluetooth 5), BLE Mesh and 2.4 Ghz proprietary standard. It allows easy connectivity with Bluetooth Smart Ready mobile phones, tablets, laptops, which supports BLE slave and master mode operation, including broadcast, encryption, connection updates, and channel map updates.

The 8253 integrates strong power balanced 32-bit MCU, BLE/2.4GHz Radio, 48kB SRAM, 512kB Flash, 14bit ADC with PGA, Analog and Digital Microphone input, stereo audio output, 6-channel PWM, one quadrature decoder (QDEC), flexible IO interfaces, and other peripheral blocks needed for Bluetooth Low Energy application development.

The 8253 also includes multi-stage power management design allowing ultra-low power operation and making it the ideal candidate for wearable and power-constraint applications. The 8253 has hardware OTA upgrades support and multiple booth switching, allowing convenient product feature roll outs and upgrades.

Features

Key features:

• 32bit proprietary MCU: Better power performance then ARM M0 with max speed of 48Mhz
• Memory: Program memory: 512kB Flash,48kB on-chip SRAM with up to 32kB retention
• RF transceiver: BLE 5.0 Compliant, 1Mbps,2Mbps, Or 2.4GHz proprietary 1Mbps/2Mbps/250kbps/500kbps mode with Adaptive Frequency Hopping feature
• Rx Sensitivity: -96dBm@BLE 1Mbps, -93dBm@ BLE 2Mbps mode, Tx output power: upto +10dBm
• Power management: Power supply of 1.8V~3.6V with Battery monitor for low battery voltage detection and Brownout detection/shutoff and Power-On-Reset

• Power performance :
  • Transceiver RX mode: 6.7mA without DCDC,3.68mA with DCDC
  • Transceiver TX mode (with modem): 6.5mA@ 0dBm without DCDC, 3.57mA with DCDC Deepsleep with SRAM retention ~1uA
  • Digital and analog interface:
  • Up to 32/17/10 GPIOs depending on package option
  • DMIC (Digital Mic), Dual AMIC (Analog Mic),I2S, Stereo Audio output
  • SPI, I2C, USB, Swire, UART with hardware flow control and 7816 protocol support
  • Up to 6 channels of differential PWM
  • IR transmitter with DMA
  • One quadrature decoder, two-phase input selectable from 8 pins
  • 10-channel (only GPIO input), 14-bit ADC
  • 4-channel PGA, differential input
  • Low power comparator

• Hardware OTA upgrade and multiple boot switch, allowing convenient product feature roll outs and upgrades
• Operating temperature: -40℃~+85℃ (ET versions) or -40℃~ +125℃ (AT versions)
• Package:
  • 8258F512ET/AT48/ 48-pin QFN 7×7mm
  • 8258F512ET/AT32/ 32-pin QFN 5×5mm
  • 8258F512ET24/, 24-pin QFN 4×4mm
• Development tools include EVB, reference design and SDK for customers to perform evaluation, quick application prototyping and firmware development.

Applications:

• Smartphone and tablet accessories
• RF Remote Control
• Sports and fitness tracking
• Wearable devices
• Wireless toys
• Smart Lighting, Smart Home devices
• Building Automation
• Smart Grid
• Intelligent Logistics/Transportation/City
• Consumer Electronics
• Industrial Control
• Health Care