AN2466

STMPE801 Device features

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STMPE801 Device features

Figure 1.

Concept of GPIO Port Expander

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Low CPU utilization (Interrupts available and so no Polling!)

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Configurable Hotkey Detection on each GPIO

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Flexibility in configuration of each of the eight GPIOs

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Low power consumption with ultra low standby current (< 1

µA)

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IO and core voltages from 1.65 V up to 3.6 V

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Interrupt output (open drain) pin

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No external clock input required

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Small package QFN16 - 16 pins 1.8 mm x 2.6 mm, making it optimal for use in

portable application like mobile phones with critical space constraints.

The STMPE801 offers great flexibility as each I/O can be independently configured as input

or output. The eight GPIOs can be connected externally to different modules like LEDs,

temperature sensors, chip selects for other devices, or as interrupt inputs from other

devices.

This device has been designed with very low quiescent current in standby mode and

includes a Hot Key detection for each I/O to optimize the power consumption of the IC.

Hotkey

Chip Enable

Temperature Sensor

Control Signal/Ext.Interrupt

Processor

CLOCK

DATA

ADDRESS

RST_N

INT

GPIO 0

GPIO 1

GPIO 2

GPIO 3

GPIO 4

GPIO 5

GPIO 6

GPIO 7

STMPE801

VCC

VIO

GND

LED BANK