The MCP61 series (Mysentech Capacitive Processor) is a new generation capacitive sensing microprocessor SOC chip launched by Mysentech Sensing. It integrates a dual-channel capacitive analog front-end sensing circuit (AFECAP), which can be directly connected to differential capacitive plates near the measured object, detecting tiny capacitance changes through resonant excitation and calculation. The excitation frequency is configurable within the range of 0.1~20MHz, and its frequency measurement output is a 16-bit digital signal, with a corresponding high resolution for capacitance sensing of1fF。
To address capacitive sensing applications across various industries, the SOC chip integrates a microprocessor with an Arm® Cortex®-M0 core, enabling algorithms for various embedded sensing and processing tasks, converting raw oscillation frequency values into specific physical quantities such as capacitance values, liquid level, moisture content, and displacement distance. Additionally, the chip's analog front-end integrates temperature sensing circuitry, suitable for sensing scenarios requiring temperature compensation. The built-in 16KB Flash memory and 2KB SRAM allow developers to write application software and store sensing calibration and application data.
The chip also integrates hardware resources such as ADC, advanced timers, general-purpose timers, and basic timers, as well as USART, SPI, and I2C interfaces.
Features:
Capacitance sensing front-end
– Measuring dual-terminal mutual capacitance
– Capacitance measurement range: 1~1000pF
– Capacitance detection frequency: 0.1~20MHz
Core and system
– 32-bit Arm®Cortex®-M0
– Operating Frequency Up to 48MHz
Memory
– 16KB Flash Memory
– 2KB SRAM
Clock, reset, and power management
– 2.5V~5.5V power supply
– Power-On/Power-Down Reset (POR/PDR), Programmable Voltage Detector (PVD)
– Embedded 48MHz HSI High-Speed Oscillator
– Embedded 40KHz LSI Low-Speed Oscillator
– Supports External Clock Input Up to 48MHz (HSE, via OSCIN Pin)
Low power consumption
– Multiple low-power modes, including: Sleep, Stop, and Deep Stop
– Average Power Consumption: 12uA@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 Clocked Hardware Watchdog Timer (IWDG)
– 1 Systick Timer: 24-bit Down Counter
11 fast I/O ports
– All I/O ports can be mapped to external interrupts
– All ports can input and output voltages not exceeding VDDsignal
3 communication interfaces
– 1 USART interface (supporting SPI mode)
– 1 I2C interface
– 1 SPI interface
1 12-bit analog-to-digital converter (ADC), supporting a fast 1μs conversion time (1MSPS sampling rate), configured with 5 external channels and 1 internal channel for acquiring the built-in reference voltage
CRC calculation unit
96-bit chip unique ID (UID)
Debug mode – Serial Wire Debug (SWD) interface
Operating temperature range -40℃~+85℃
QSOP24/QFN24 package options available
Applications:
Continuous liquid level detection
Water immersion detection
Material dielectric detection
