STMPE2401

STMPE2401 24-bit Enhanced port expander with Keypad and PWM controller Xpander logic Features ■ 24 GPIOs www.DataSheet4U.com ■ Operating ■ ■ ■ ■ ■ ■ voltage 1.8V Hardware key pad controller (8*12 matrix max) 3 PWM (8 bit) output for LED brightness control and blinking Interrupt output (open drain) pin Configurable hotkey feature on each GPIO Ultra-low Standby-mode current Package TFBGA - 36 pins 3.6x3.6mm, pitch 0.5mm TFBGA Description The STMPE2401 is a GPIO (General Purpose Input / output) port expander able to interface a Main Digital ASIC via the two-line bidirectional bus (I2C); separate GPIO Expander IC is often used in Mobile-Multimedia platforms to solve the problems of the limited amounts of GPIOs usually available on the Digital Engine. The STMPE2401 offers great flexibility as each I/Os is configurable as input, output or specific functions; it's able to scan a keyboard, also provides PWM outputs for brightness control in backlight, rotator decoder interface and GPIO. This device has been designed very low quiescent current, and is including a wake up feature for each I/O, to optimize the power consumption of the IC. Potential application of the STMPE2401 includes portable media player, game console, mobile phone, smart phone Figure 1. Device summary Part number STMPE2401TBR Package TFBGA36 Packaging Tape and reel May 2007 Rev 2 1/55 www.st.com 55 Contents STMPE2401 Contents 1 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...