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Touch Controllers
S-Touch™ Resistive Touch Screen Controller
Introduction
The S-Touch touchscreen controller is a four-wire resistive controller featuring autonomous functionality to minimise demands on the host processor. For embedded designers, this frees valuable CPU cycles to ease pressure on performance, power consumption and response times.
Advanced Movement tracking
The host may set a value from 4 to 127 as the distance between the new touch position and the previous position so it may be considered as the valid new position. This reduces redundant, nearby data positions.
Window Masking
The host may define a rectangle within the full window so that if the touch position falls outside of the defined window, the touch is simply ignored.
Data Buffer (FIFO)
128 sets of data buffers in the touchscreen controller ensure that no data is missing, even if the CPU is busy. Each data buffer contains a 12-bit x-coordinate, a 12-bit y-coordinate and an 8-bit touch pressure interrupt on FIFO full, FIFO empty and FIFO reaching programmable threshold.
Features
- IQQ2C (400kHz) or SPI (1MHz) serial interface
- 12-bit ADC for high-resolution touchscreen
- 128-depth data buffering
- Advanced movement tracking to reduce CPU/bus use
- Window masking function allows intelligent use of screen
- 4 kV HBM ESD protection
- Ultra-low power consumption (active <1mA, idle <1μA)
- Ultra-small (3.0 x 3.0mm) QFN16 package
S-Touch™ Resistive Touch Screen Controller
| GPIOs | Vcc | Touchscreen Technology | Interface | Part Number |
8 |
1.8 to 3.3 V |
4-wire resistive |
SPI/I2C |
STMPE811 |
6 |
1.8 to 3.3 V |
4-wire resistive |
SPI/I2C |
STMPE610 |
Need to know more
Anglia Displays is able to provide extensive technical support and advice during your assessment and design-in of LCDs. We can also provide starter kits, evaluation boards and reference platforms to enable you to fast track the introduction of your end product. Click here for more information
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