STMPE321QTR STMicroelectronics, STMPE321QTR Datasheet - Page 2

IC CTLR TOUCH KEY 3CH 12-QFN

STMPE321QTR

Manufacturer Part Number
STMPE321QTR
Description
IC CTLR TOUCH KEY 3CH 12-QFN
Manufacturer
STMicroelectronics
Series
S-Touch™r
Type
Capacitiver
Datasheets

Specifications of STMPE321QTR

Number Of Inputs/keys
3 Key
Resolution (bits)
8 b
Data Interface
I²C
Data Rate/sampling Rate (sps, Bps)
100k
Voltage - Supply
1.65 V ~ 1.95 V
Mounting Type
Surface Mount
Package / Case
12-QFN
Voltage Supply Source
Single Supply
Resolution
7 bit to 10 bit
Interface Type
I2C
Supply Voltage (max)
1.95 V
Supply Voltage (min)
1.65 V
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Sampling Rate (per Second)
-
Lead Free Status / Rohs Status
 Details
Other names
497-8985-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STMPE321QTR
Manufacturer:
MICREL
Quantity:
54
Contents
Contents
1
2
3
4
5
6
7
8
9
10
11
12
2/40
STMPE321 functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
1.2
1.3
Capacitance compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
2.2
I
Register map and function description . . . . . . . . . . . . . . . . . . . . . . . . . 12
System and identification registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Interrupt controller module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
GPIO controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Capacitive touch module registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.1
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2
C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
STMPE321 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin assignment and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
STMPE321 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Calibration algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1.1
2.1.2
Power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Capacitive sensing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Noise filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Data filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Doc ID 15791 Rev 3
STMPE321

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