CapSense microcontroller provides CSX capacitive sensing with up to 31 CapSense I/O channels and proximity sensing support. The device uses an M8C CPU running up to 24 MHz with 8 kByte flash and 1 kByte SRAM. It operates from 1.71 V to 5.5 V across a -40 °C to 85 °C temperature range. Integrated peripherals include a 10-bit delta-sigma ADC, I2C, SPI, software PWM, and three timer/counter blocks.
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| CPU | M8C |
| Maximum frequency | 24MHz |
| Flash memory | 8kByte |
| SRAM | 1kByte |
| Operating voltage range | 1.71 to 5.5V |
| Operating temperature range | -40 to 85°C |
| CapSense technology | CSX |
| CapSense channels | 1 |
| CapSense I/O | 31 |
| GPIOs | 36 |
| Communication interfaces | I2C, SPI |
| I2C interfaces | 1 |
| SPI interfaces | 1 |
| ADC | Delta-sigma, 1 module, 10-bit at 5.9 ksps |
| Timer/counter blocks | 3 |
| PWM | Software |
| Proximity sensing | Yes |
| Peak reflow temperature | 260°C |
These are design resources that include the Cypress Semiconductor CY8C20637
Technical reference manual for PSoC CY8C20xx7/S and CY8C20055 families covering M8C CPU core, CapSense, digital resources, and register configurations.
