STMPE2401 is a 24-bit Enhanced port expander with Keypad and PWM controller features. It features 24 GPIOs, 1.8V operating voltage, hardware key pad controller (max 8*12 matrix), 3 PWM (8 bit) outputs for LED brightness control and blinking, interrupt output (open drain) pin, configurable hotkey feature on each GPIO and ultra-low Standby-mode current.
The STMPE2401 is a GPIO (General Purpose Input/Output) port expander designed to interface with a Main Digital ASIC via a two-line bidirectional I2C bus. It is commonly used in mobile multimedia platforms to address the limited GPIOs available on digital engines. The device offers high flexibility, allowing each I/O to be configured as an input, output, or specific function such as a keypad scan, PWM output for backlight control, or a rotator decoder interface. It features an ultra-low quiescent current and includes a wake-up feature for each I/O to optimize power consumption.
| Number of GPIOs | 24 |
|---|---|
| Operating voltage | 1.8V |
| Keypad matrix size | 8x12 |
| PWM outputs | 3 (8 bit) |
| Package type | TFBGA - 36 pins |
| Pitch | 0.5mm |
The device operates at 1.8V.
The device provides 24 GPIOs.
The hardware keypad controller supports a maximum of 8x12 matrix.