STMPE321
STMPE321 is 3-channel capacitive touch key controller manufactured by STMicroelectronics.
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3-channel capacitive touch key controller
Features
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- Up to 3 GPIOs Up to 3 capacitive touch key inputs Operating voltage 1.65
- 1.95 V Internal regulator Interrupt output pin I2C interface (1.8 V operation, 3.3 V tolerant) 8 k V HBM ESD protection 40 f F resolution, 128-step capacitance measurement Advanced data filtering (AFS) Environment tracking calibration (ETC) Individually adjustable touch variance (TVR) settings for all channels Adjustable environmental variance (EVR) for optimal calibration Capacitive key sensing capability in 27 µA sleep mode
QFN12 (2.2 x 1.5 mm)
Description
The STMPE321 is a 3-channel capacitive touch key controller. Capacitance measurement is implemented in fully optimized hardware. All 3 I/Os can be configured via an I2C bus to function as either capacitive touch key, or as GPIOs (general purpose I/O).
Applications
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- Mobile phones and smartphones Portable media players Game consoles
Table 1.
Device summary
Order code STMPE321QTR Package QFN12 (2.2 x 1.5 mm) Packing Tape and reel
June 2009
Doc ID 15791 Rev 1
1/40
.st. 40
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Contents
Contents
1 STMPE321 functional overview
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