Datasheet

CY8C21x34/B CapSense
®
Design Guide Document No. 001-66271 Rev. *B 9
1.3 CY8C21x34/B CapSense Plus Family Features
Cypress’s CY8C21x34/B is a low-power, high-performance, programmable CapSense controller family that features:
1.3.1 Advanced Touch Sensing Features
 Programmable capacitive sensing elements
 Supports a combination of CapSense buttons, sliders, and proximity sensors with CSD and CSDADC
capacitive sensing technology
 SmartSense™ Auto-tuning (CY8C21x34B)
 Contains an integrated API to implement buttons and sliders
 Supports up to 24 capacitive buttons and 4 sliders
 Supports proximity sensing up to 5 cm (with on-board PCB trace)
 Water-tolerant performance with shield electrode
1.3.2 Device Features
 High-performance, low-power M8C Harvard-architecture processor
 M8C processor speeds up to 24 MHz
 Flexible on-chip memory
 Up to 8 KB of flash and 512 B of SRAM
 Emulated EEPROM supported
 Precision, programmable clocking
 Internal main oscillator (IMO): 24/48 MHz ± 2.5%
 Internal low-speed oscillator (ILO) at 32 kHz for watchdog and sleep
 Enhanced general-purpose input/output (GPIO) features
 Up to 28 general-purpose I/Os (GPIOs) with programmable pin configuration
 25-mA sink current on all GPIOs
 Internal resistive pull-up, HI-Z, open-drain, and strong drive modes on all GPIOs
 Peripheral features
 Counter, timer, PWM, Pulse Width Discriminator (PWD), and hardware 7-segment drive
 I
2
C communication with Master, Slave, and Multi-Master configurations
 SPI, UART, IRDA, and one-wire communication protocols
 Operating Conditions
 Operating Voltage: 2.4 V to 5.25 V with operation down to 1.0 V by using on-chip switch mode pump
 Temperature Range: –40
o
C to +85
o
C
 Packaging
 16-pin SOIC (150-MIL) to 32-pin QFN (5 x 5 mm)
 AEC qualified automotive grade parts – CY8C21334 and CY8C21534