CYAT81658-64AS48

What is CYAT81658-64AS48?

This device contains a high-performance Arm 32-bit CPU with an integrated hardware multiply unit. This CPU controls all sensing and processing of measured capacitance results to allow tracking and

reporting touches. The controller is optimized for low power and fast response time, with built-in support for manufacturing test. The touchscreen controller communicates with a host through an I2C slave

interface at up to 400 kbps or an SPI interface at up to 8 Mbps.

Collects the touchscreen sensor information using the touch subsystem.

This touch subsystem consists of a 5-V TX pump, TX drivers, RX channels, and a programmable transmit/receive (TX/RX) multiplexer.

The multiplexer electrically connects the analog front end of each RX channel and TX driver to the appropriate row and column electrodes of the touchscreen sensor.

The controller TX/RX multiplexer allows flexibility of chip placement on the FPC. All pins connecting to the touchscreen sensor are programmable as either TX or RX.

CYAT81658-64AS48 Applications：

32-bit Arm® Cortex®  CPU Register-configurable  Noise-suppression technologies for display and EMI

Effective 20-V drive for higher signal-to-noise ratio (SNR)  AutoArmor improves both electromagnetic emissions and immunity

External display synchronization  Water rejection and wet-finger tracking using DualSense  Multitouch glove with automatic mode switching

Ten fingers with thin glove ( 1-mm thick) Two fingers with thick glove ( 5-mm thick)  Large object rejection

Automatic baseline tracking to environmental changes  Low-power look-for-touch mode

Manufacturing Test Kit (MTK)  Touchscreen sensor self-test

Low power CAPSENSE™ wake-up button with power consumption of 50 µA  Low power wake-on-touchscreen with power consumption of 120 µA

System performance (configuration dependent)  Screen sizes up to 8.5-inch diagonal

6.2-mm electrode pitch; 16:9 aspect ratio  Up to 48 sense pins, 560 intersections; 16:9 aspect ratio (28 × 20)  Reports up to 10 fingers

Small finger support down to 4 mm  Refresh rate up to 250 Hz; other rates configurable  TX frequency up to 350 kHz