OM6681-昂瑞微 OnMicro

OM6681x dual core system, include Application Core and SensorHubCore, there are several shared System Peripheral blocks between AppCore and SensorHubCore. Application core is a Coretex-M33S core plus multiple Master/slave AHB standard system. SensorHubCore is a Coretex-M33S core plus rich peripheral interfaces. The two cores can communicate with IPC channels, memories and peripherals.

BT Features
• Support full BT 5.2 dual-mode feature (BT BR/EDR and BLE)
• Support A2DP/AVCTP/AVDTP/AVRCP/HFP/HSP/SPP/SMP/ATT/GAP/GATT/ RFCOMM/SDP/L2CAP
• Support LC3 decoder to enhance audio quality
• Support Connected isochronous Groups for TWS application
• Support Broadcast isochronous stream and group
RF Features
• -96dBm sensitivity @BLE 1Mbps, TX power 10dBm
• -93dBm sensitivity @BLE 2Mbps, TX power 10dBm
• -92dBm sensitivity @BT 1Mbps, TX power 0dBm
• -92dBm sensitivity @BT 2Mbps, TX power 0dBm
• 9.0mA RX@BLE
• 9.0mA TX (0dBm) @BLE
• RSSI (1db resolution)
MCU & Memory
• 208MHz ARM M33S + 96MHz M33S
• 16K D-CACHE + 16K I-CACHE
• 512KB(Core0) + 96KB(Core1) Internal RAM
• Serial Flash: 2MB
• PSRAM
• - OM6681A: 8MB
• - OM6681B: -
• - OM6681C: -
Clocks
• 32MHz crystal, 32MHz RC, 32.768KHz crystal, 32.768KHz RC
• Three 32.768KHz clock outputs in retention state
Power Management
• Deep sleep power: 14uA (RTC on, 384K RAM retention), 0.25uA/8K for retention RAM adding
• MCU power consumption: 4mA in 64MHz, adding 20uA/MHz for frequency increasing
• Supply voltage range 2.4V to 5.5V
• Built-in 2 BUCK DCDC converters
• Built-in PMU&Charger (25mA ~ 300mA, step: 25mA)
Software
• Full compliant with BT dual-mode 5.2, complete power-optimized stack, including controller and host
• Sample applications and profiles
• Supports OTA
• Secure boot
• Supports Free RTOS and driver interface
• Supports Lite OS and driver
• Supports LC3
• Supports AAC/SBC/mSBC/CVSD decoder
• Supports MP2/MP3/WMA/WAV/FLAC/AAC/ M4A(AAC) decoder
Peripherals
• (8 + 8) channels DMA
• UART interface up to 5
• I2S interface up to 3
• Up to 46 GPIOs
• I2C master and slave interface up to 4
• SPI master and slave interface up to 3
• Two flash controllers + PSRAM controller + graphic controller
• Support PSRAM QSPI/OPI, SDR, DDR
• eMMC/SD SDR mode up to 96MHz
• Watchdog to prevent system dead lock x 2
• RTC
• LED Driver (16*2.5mA, max16*6mA)
• 32-bit timers up to 5
• 8 single-end or differential-end 12-bit GPADC
• Fully programmable pin assignment
• USB full speed device
• QDEC x 3
• Capacitive Sensing Interface (Minimum detection capacitance difference: 0.2pF)
• Independent PWMs x 5
Security and Encryption
• AES hardware encryption 256
• ECDSA 256
• SHA256
• Secure boot
• Secure debug
• Secure storage
• Hardware True Random Number Generator
• 4Kbit EFUSE
Audio
• Acoustic Echo Cancellation
• Noise Suppression
• Adaptive Dual Microphone
• Wind Noise Reduction
• Howling Suppression Control
• Dynamic Range Control
• Multi-band EQ
• Stereo Audio DAC
• OM6681A / B : Mono Audio DAC, OM6681C : Stereo Audio DAC
• - 97dB SNR
• - 88dB THD
• - Sample rates from 8Khz to 96KHz
• Stereo Audio ADC
• - 95dB SNR
• - 85dB THD
• - Sample rates from 8Khz to 96KHz
• 24-bit audio resolution
• Two analog MICs/two digital MICs
Display Interface
• SPI/DSPI/QSPI controller for Flash and display
• QSPI/OPI controller for PSRAM
• Graph2D
• - Image decoder
• - Image scaling
• - Image decompression
• - Gradient overlay
Package and Work Environment
• QFN68 (7*7*mm 0.35mm pitch)
• -40℃ ~ +85℃

The OM6681x integrated circuit has a fully integrated radio transceiver and base band processor for Bluetooth® Smart. It can be used as an application processor as well as a data pump in fully hosted systems. Such as Wearables, Health and medical, Bluetooth speaker, Smart home kit.etc.