STMicroelectronics STMPE321
The STMPE321 is a 3-channel capacitive touch key controller. 39 2/40 Doc ID 15791 Rev 1 STMPE321 STMPE321 functional overview 1 STMPE321 functional overview The STMPE321 consists of the following blocks: ● ● ● ● GPIO controller Impedance sensor Touch key controller I2C interface 1.1 STMPE321 block diagram Figure 1.| Part No. | STMPE321 |
|---|---|
| Datasheet | STMPE321 Download |
| Manufacturer |  STMicroelectronics |
| Description | 3-channel capacitive touch key controller |
| Buy | Stock & Price |
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 kV HBM ESD protection 40 fF 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
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 40 Contents STMPE321 Contents 1 STMPE321 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
