STMPE811QTR Interface I/O Expanders

The STMPE811QTR is a Microcontroller in the 32-bit ARM® Cortex®-M4 series from ST. This article will provide additional information about STMPE811QTR.

STMPE811QTR Description

The STMPE811QTR is a GPIO port expander that connects to a primary digital ASIC through a two-line bidirectional bus (I2C). Mobile multimedia platforms often use a dedicated GPIO expander to overcome the limitations caused by the small number of GPIOs provided by the digital engine.

Because it has so many input and output (I/O) pins, the STMPE811QTR gives you a lot of flexibility in terms of how you may use the device. It has been designed to have a very low quiescent current, and a wakeup feature has been incorporated for each I/O port so that the device’s power consumption can be reduced to a minimum.

A touchscreen controller consisting of four wires is integrated into the STMPE811QTR. The touchscreen controller has been upgraded to include a buffer that is 128 bits by 32 bits, an active window that can be customized, and an algorithm that tracks movement (to reduce data volume).

STMPE811QTR Specifications

STMPE811QTR Features

• There are 8 GPIOs.
• It operates between 1.8 and 3.3 volts.
• It has a built-in touchscreen controller with four wires.
• Wakeup feature for each I/O SPI and I2C interface interrupt output pin
• In 12C mode, two devices may share the same bus (1 address line)
• 12-bit 8-input ADC
• touchscreen with a 128-depth buffer controller
• movement detection algorithm for touchscreens
• Air-gap ESD safeguards at 25 kV (system level)
• 4 kV HBM ESD defense (device level)

STMPE811QTR Manufacturer

STMicroelectronics is a leading independent semiconductor company that operates all over the world. They are also the leading provider of semiconductor solutions for a wide range of applications in the microelectronics industry. The company is at the forefront of System-on-Chip (SoC) technology, and its solutions are crucial in supporting current convergence trends. This is made possible by an unmatched combination of silicon and system expertise, manufacturing strength, an Intellectual Property (IP) portfolio, and strategic partners.

Frequently Asked Questions

What field of technology does STMicroelectronics lead in?

System-on-Chip

Which company is the industry standard bearer for designing, developing, and distributing semiconductor solutions throughout the full breadth of microelectronics applications?

STMicroelectronics

What does the STMPE811QTR feature?

Support for all Arm single-precision data-processing instructions and data types is provided via standard and sophisticated communication interfaces and a floating point unit (FPU) with single precision.

What is General-purpose input/output

Integrated circuits and printed circuit boards often feature uncommitted digital signal pins that can be used as inputs, outputs, or both under software control; these are known as general-purpose inputs/outputs (GPIOs). There is no default use for GPIOs; hence they are typically ignored. If employed, a GPIO’s function and behavior are specified and implemented by the designer of higher-level assembly-level circuitry, such as a circuit board designer for an integrated circuit’s GPIOs or a system integrator for a board-level GPIOs.

What Integrated circuit GPIOs?

Different general-purpose input/output operations (GPIOs) can be implemented on integrated circuits (ICs). Some integrated circuits (ICs) have general-purpose input/output (GPIO) capabilities as a significant function. In contrast, other ICs include GPIO capabilities as a convenient “accessory” to one of their primary functions. Some examples of the former include the Intel 8255, It connects 24 GPIOs to a parallel bus for communications, as well as various GPIO expander Ics , which connect GPIOs to serial communication busses like I2C and SMBus. Another example of the latter would be using a parallel communication bus to transfer data. The Realtek ALC260 IC is an excellent example of the latter type since, in addition to its primary duty as an audio codec, it also includes eight GPIOs.

GPIOs are typically included on the ICs that makeup microcontrollers. Depending on the use case, a microcontroller’s general-purpose input/output (GPIO) pins may be the main interface to the device’s external circuitry or merely one of the numerous I/O types, such as analog signal I/O, counter/timer, and serial communication.

A general-purpose input/output (GPIO) pin on some integrated circuits (ICs), notably microcontrollers, may have additional capabilities in addition to its GPIO role. In such circumstances, in addition to establishing the behavior of the GPIO, it is frequently essential to configure the pin so that it can work as a GPIO (in comparison to its other functions). Some microcontroller devices, such as those belonging to the Microchip dsPIC33 family, have built-in signal routing circuitry that enables the device’s general-purpose input/output (GPIO) pins to be mapped in a programmable manner. Field-programmable gate arrays, sometimes known as FPGAs, enhance this capability by enabling programmatic control of GPIO pin mapping and instantiation and architecture.

Conclusion

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