Using the MAX7359 for Multifunctional and Gaming Keys on PDAs/Smartphones: A Programming Guide
Category: Telephone, cellular phone and intercom
Manufacture: Maxim Integrated Products
Datasheet: Download this application note
The keypad control properties of cell phone chipsets are often stretched to their limits when an operating system or application needs to detect multiple keypresses (e.g. Ctrl-Alt-Del and gaming controls). The MAX7359 is an ideal add-on key-switch controller for implementing multifunctional and gaming keys on a PDA/smartphone QWERTY keypad. The MAX7359 can be connected to the cell phone chipset through an I,C interface, and simple program coding can be used to select a set of desired features.