Mysentech MCP1085S

MCP1085S is a next-generation capacitive sensing microprocessor SOC chip, integrating a ten-channel, multi-mode, wide-frequency capacitive analog front-end sensing circuit, microprocessor, memory, and rich I/O interfaces. The capacitance measurement frequency is configurable in the range of 0.1~30MHz, with a 16-bit digital output and a maximum resolution of 1fF. The chip supports multiple operating modes, capable of measuring single-ended capacitance, floating differential capacitance, and mutual capacitance, among others. An integrated 16-bit high-precision digital temperature sensor enables applications requiring temperature compensation and other temperature-combined sensing. To address embedded processing for capacitive sensing across industries, the SOC integrates an Arm Cortex-M0+ core microprocessor for edge computing of various sensing algorithms, converting raw measured oscillation frequency values into capacitance and specific physical quantities such as liquid level, moisture content, displacement, and proximity distance. The chip features built-in 64KB Flash, 1KB Data Flash, and 4KB SRAM, allowing developers to write application software and store sensor calibration and application data. The chip also integrates hardware resources including ADC, advanced timers, general-purpose timers, and 16-bit basic timers, as well as interfaces such as USART and I2C.

• Capacitance sensing front-end:
  • 10-channel single-ended / 5-channel differential capacitance measurement
  • Capacitance measurement range: 1pF~10nF
  • Capacitance detection frequency: 100KHz~30MHz
  • Capacitance/frequency resolution: 16-bit
  • Active shielding support
  • Integrated digital temperature measurement, 16-bit, 0.5°C typical accuracy
• Core & System:
  • 32-bit Arm Cortex-M0+
  • Operating frequency up to 48MHz
• Memory:
  • 64KB Flash
  • 1KB Data Flash
  • 4KB SRAM
• Clock, Reset & Power Management:
  • 2.3V~5.5V supply voltage
  • Power-on/power-down reset (POR/PDR), programmable voltage detector (PVD)
  • Embedded 48MHz HSI high-speed oscillator
  • Embedded 40KHz LSI low-speed oscillator
  • Low power consumption
  • Low-power modes: Sleep and Deep Sleep
  • Average current consumption: 6.4uA@1Hz
• 5 Timers:
  • 1× 16-bit 4-channel advanced-control timer (TIM1)
  • 1× 16-bit 4-channel general-purpose timer (TIM3)
  • 1× 16-bit basic timer (TIM14)
  • 1× independent watchdog timer (IWDG)
  • 1× SysTick timer: 24-bit down-counter
• 10 Fast I/O Ports:
  • All I/O pins mappable to external interrupts
  • All ports support input/output signals not exceeding VDD
• 3 Communication Interfaces:
  • 2× USART
  • 1× I2C
• 1× 12-bit ADC, up to 1μs conversion time (1MSPS sample rate), with 5 external channels and 1 internal channel for built-in reference voltage measurement
• CRC calculation unit
• 96-bit unique device ID (UID)
• Debug interface: SWD
• Operating temperature range: -40°C~+85°C
• Single-channel conversion time: 0.1ms~23.5ms configurable
• Built-in 16-bit high-precision digital temperature measurement

• Liquid level measurement
• Moisture content measurement
• Humidity analysis
• Water immersion sensing
• Dielectric detection
• Proximity sensing
• Touch key