STMPE811
S-Touch® advanced resistive touchscreen controller with 8-bit GPIO expander-
Active
The STMPE811 is a GPIO (general purpose input/output) port expander able to interface a main digital ASIC via the two-line bidirectional bus (I2C). A separate GPIO expander is often used in mobile multimedia platforms to solve the problems of the limited amount of GPIOs typically available on the digital engine.
The STMPE811 offers great flexibility, as each I/O can be configured as input, output or specific functions. The device has been designed with very low quiescent current and includes a wakeup feature for each I/O, to optimize the power consumption of the device.
A 4-wire touchscreen controller is built into the STMPE811. The touchscreen controller is enhanced with a movement tracking algorithm (to avoid excessive data), a 128 x 32 bit buffer and programmable active window feature.
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Datasheet
Key Features
- 8 GPIOs
- 1.8 - 3.3 V operating voltage
- Integrated 4-wire touchscreen controller
- Interrupt output pin
- Wakeup feature on each I/O
- SPI and I2C interface
- Up to 2 devices sharing the same bus in I2C mode (1 address line)
- 8-input 12-bit ADC
- 128-depth buffer touchscreen controller
- Touchscreen movement detection algorithm
- 25 kV air-gap ESD protection (system level)
- 4 kV HBM ESD protection (device level)
Circuit Diagram
Design Resources
TopTechnical Documentation
Product Specifications
| Description | Version | Size |
|---|---|---|
DS5742: S-Touch® advanced resistive touchscreen controller with 8-bit GPIO expander
|
6.0 | 654 KB |
Application Notes
| Description | Version | Size |
|---|---|---|
|
AN2748: STMPE811 PCB design guideline
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1.0 | 99 KB |
|
AN2807: STMPE811 reference code for touchscreen controller operation
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1.0 | 99 KB |
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AN2825: S-Touch® STMPE811 resistive touchscreen controller advanced features
|
1.3 | 157 KB |
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AN3128: STM32 embedded graphic objects/touchscreen library
|
5.1 | 4,400 KB |
Technical Notes & Articles
| Description | Version | Size |
|---|---|---|
|
TN0074: Calibration procedure for a resistive touchscreen system based on the STMPE811
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1.4 | 435 KB |
User Manual
| Description | Version | Size |
|---|---|---|
|
UM0772: Advanced resistive touchscreen controller demonstration kit based on the STMPE811
|
3.0 | 849 KB |
|
UM0857: Smart monitoring system STEVAL-IFS014V1 and STEVAL-IFS015V1, based on the STM32x
|
1.1 | 1,690 KB |
Related Tools and Software
Related Tools and Software
| Part Number | Description |
|---|---|
| STEVAL-CCM004V1 | TFT LCD panel controller board for the STM3220G-EVAL |
| STEVAL-ICB004V1 | Advanced resistive touchscreen controller demonstration board based on the STMPE811 |
Publications and Collaterals
Brochure
| Description | Version | Size |
|---|---|---|
|
S-Touch controllers
|
1.0.0 | 1,093 KB |
Sample & Buy
Top| Part Number | Marketing Status | Package | Packing Type | Operating Temperature (min) | Operating Temperature (max) | Automotive Grade | Order From ST | Unit Price (US$)* @ | Distributor Availability | RoHS Compliance Grade | Download Material Declaration** |
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| STMPE811QTR | Active | VFQFPN 16 3x3x1.0 | Tape And Reel | _ |
| Ecopack2 | PDF XML | |||||||||||||||||||||||||||||
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors (**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices. |
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