An MCU-based 8-channel capacitive touch sensor
* Properties
- 8-bit Turbo 80C51 Architecture (4 clock cycles / 1 machine cycle)
- Max. 10 programmable I/O pins (Bi-direction, Open-drain output, Push-pull output)
- Power-on- Reset (POR) by Low Voltage Detector (LVD)
- 2 Selectable internal ring Oscillators (12MHz / 300KHz)
- Programmable Watchdog Timer
- 3-channel 16-bit Timer/Counters
- Simple UART (mode 1 only)
- 2-channels I2C (I2C Master, I2C Slave)
- Smart Touch Sense Engine (max. 9-channel)
* 8-channel dedicated input (included 2nd dummy channel)
- 11 interrupt sources including 2 external ones
* Timer 0/1/2, WDT, TOUCH, UART, 2-I2C, I2C, Wakeup
* Two external interrupt : selectable Edge / Level of source
* Two level interrupt priority
- Reset scheme
* on-chip Power-on-Reset (with LVD)
* External reset
* Watchdog timer reset
- Power consumption
* Active current : max 3mA @ 3V
* Idle current : max 1.8mA @ 3V
* Standby current : max 1mA @ 3V (Operating Timer2)
* Power down current : max 1.3mA @ 3V
- ESD protection up to 8,000V
- RoHS compliant 24QFN / 24SOP package
* Applicability
- Home application
- Membrane switch replacement
- Sealed control panels, keypads
- Door key-lock matrix application
- Touch screen replacement application
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