STMPE2401 Datasheet, PDF (1/55 Pages) STMicroelectronics – 24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

STMPE2401
24-bit Enhanced port expander with Keypad and PWM controller
Xpander logic
Features
■ 24 GPIOs
■ 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
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