Silabs C8051F99x低功耗高灵敏容性触摸解决方案

1、Silabs C8051F99x低功耗高灵敏容性触摸解决方案关键字：消费类电子,家用电器,游戏机,工业控制,仪表屏,触摸屏25 MIPS, 8 kB Flash, Ultra Low Power, Capacitive Sensing MCUThe QuickSense C8051F99x family of capacitive sensing MCUs provides the lowest power and highest sensitivity touch sensing solution for capacitive buttons, sliders, wheels and cap

2、acitive proximity sensing. Architected from the popular C8051F9xx platform the device features a 150 µA/MHz active mode and multiple sleep modes as low as 10 nA.  With up to 14 capacitive sensing inputs and a patent-pending charge timing hardware capacitance to digital converter, the C8051

3、F99x achieves unparalleled touch sensitivity, speed and ultra-low power in packages as small as a 3 mm x 3 mm QFN20.C8051F99x系列主要特性：Capacitance to Digital Converter-Supports buttons, sliders, wheels, and capacitive proximity sensing-Fast 40 s per channel conversion time-16-bit resolution-Up to 14 in

4、put channels-Auto-accumulate up to 64x samplesUltra-Low Power-150 A/MHz active current from 1.83.6 V 25 MHz-10 nA sleep current with data retention; BOD disabled-50 nA sleep current with data retention; BOD enabled-300 nA sleep current with smaRTClock (internal oscillator)-600 nA sleep current with

5、smaRTClock (external crystal)-2 s wake up from sleepSupply Voltage 1.8 to 3.6 V-Built-in brown-out detector-On-chip LDO regulator for core supplyAnalog to Digital Converter-75 ksps with 12-bit resolution (F990/6)-330 ksps with 8-bit resolution-Up to 10-channels-Autonomous burst mode with 16-bit aver

6、aging accumulator-VREF from external pin, VDD, or internal regulator-Built-in temperature sensorInternal 6-Bit Current Reference-2 ranges: source or sink capability-Up to 14-bit resolution via PWM interpolationComparator-Programmable hysteresis and response time-Configurable as interrupt or reset so

7、urce-Low current (< 0.4 A)Development Kit: C8051F996DKHigh-Speed 8051 C Core-Pipe-lined instruction architecture; executes 70% of instructions in 1 or 2 system clocks-25 MIPS peak throughput with 25 MHz clock-Expanded interrupt handlerMemory-512 bytes internal data RAM (256 + 256)-8 kB Flash; In-

8、system programmable in 512 byte sectors; Full read/write/erase functionality over the entire supply rangeOn-Chip Debug-On-chip debug circuitry facilitates full speed, non-intrusive in-system debugDigital Peripherals-17 port I/O; Programmable drive strength-Hardware enhanced UART, SPI and SMBus seria

9、l ports-CRC block provides 16-Bit CCITT polynomial calculation-Four general purpose 16-bit counter/timers-16-bit programmable counter array (PCA) with three capture/compare modules and enhanced PWM functionalityClock Sources-24.5 MHz ±2% oscillator; supports crystal-less UART operation-Low powe

10、r internal oscillator: 20 MHz-External oscillator: Crystal, RC, C, CMOS clock-Can switch clock sources on-the-fly; useful for power saving modesTemperature Range: -40 to +85 °CPackage Options-24-pin QFN (4x4 mm), RoHS compliant-24-pin QSOP (easy to hand solder) RoHS compliant-20-pin QFN (3x3 mm

11、), RoHS compliantC8051F99x 应用：Instrumentation panelsTouch panelsKiosksGaming systemsIndustrial interfaceSecurityResidential HVACHome appliancesToysKeyboardsFax/printer/scanner front panels图1。C8051F990方框图图2。C8051F991方框图图3。C8051F996方框图图4。C8051F997方框图图5。C8051F99x系列I/O端口功能方框图C8051F996 开发套件The C8051F996D

12、K Development Kit contains everything needed to develop applications with the C8051F990, F991, F996 and F997 family of ultra low power capacitive sensing MCUs and the C8051F980, F981, F982, F983, F985, F986, F987, F988 and F989 family of ultra low power MCUs.The C8051F996 Development Kit c

13、ontains the following items: C8051F996 Target Boardn C8051Fxxx Development Kit Quick-Start Guiden Silicon Laboratories IDE and Product Information CD-ROM. CD content includes the following:nSilicon Laboratories Integrated Development Environment (IDE) lEvaluation version of 8051 development tools (macro assembler, linker, C compiler) lSource code examples and register definition files lDocumentation lC8051F996 Development Kit Users Guide (this document) l Third Party Tools C