STMPE321 ST Microelectronics, STMPE321 Datasheet - Page 4

• Manufacturer Part Number: STMPE321
• Description: 3-channel capacitive touch key controller
• Manufacturer: ST Microelectronics

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STMPE321 functional overview
1.2
4/40
Pin assignment and function
Figure 2.
Table 2.
Pin number
10
11
12
1
2
3
4
5
6
7
8
9
QFN12 pin assignment (top view)
Pin assignment and function
GPIO_2 / touch 2
GPIO_1 / touch 1
GPIO_0 / touch 0
Pin name
6
5
4
GND
ARef
VCC
SDA
RST
SCL
INT
NC
NC
Doc ID 15791 Rev 1
7
3
GPIO 2
GPIO 1
GPIO 0
-
I
I
GND
Supply voltage
Reference capacitor for touch sensor
-
INT output (open drain)
RESET (active low)
This pin is internally pulled up to V
2
2
C data
C clock
8
2
9
1
Description
10
11
12
CC
STMPE321