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AN246

STMPE801 - Hardware Interface guide

STMicroelectronics 

AN2466

1

STMPE801 Device features

STMPE801 Device features

Figure 1. Concept of GPIO Port Expander

VCC VIO

Processor

CLOCK

DATA

ADDRESS

INT

RST_N

GPIO 0

GPIO 1

GPIO 2

GPIO 3

STMPE801

GPIO 4

GPIO 5

GPIO 6

GPIO 7

GND

Hotkey

Chip Enable

Temperature Sensor

Control Signal/Ext.Interrupt

LED BANK

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

– Configurable Hotkey Detection on each GPIO

– Flexibility in configuration of each of the eight GPIOs

– Simpler communication with CPU (just two I2C lines)

– Low power consumption with ultra low standby current (< 1 µA)

– IO and core voltages from 1.65 V up to 3.6 V

– Interrupt output (open drain) pin

– No external clock input required

– 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.

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