STEVAL-ICB002V1 STMicroelectronics, STEVAL-ICB002V1 Datasheet - Page 32

• Manufacturer Part Number: STEVAL-ICB002V1
• Description: BOARD EVAL TOUCH STM32/STMPE821
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ICB002V1

• Sensor Type: Touch, Capacitive
• Sensing Range: 3 Button/Key
• Interface: USB
• Voltage - Supply: 3.3V
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: STMPE821
• Silicon Manufacturer: STMicroelectronics
• Kit Contents: Board
• Features: PWM/GPIO Output, Multiple Touch Detection, Demonstrates Up To 3 Capacitive Touch Keys
• Svhc: No SVHC (15-Dec-2010)
• For Use With: 497-10173 - BOARD EVAL S-TOUCH STM32
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Sensitivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-10167

Capacitive touch module registers
TVR
Address:
Type:
Reset:
Description:
EVR
Address:
Type:
Reset:
Description:
STRENGTH_THRESHOLD
Address:
Type:
Reset:
Description:
32/50
RESERVED
RESERVED
7
7
7
[6:0] TVR:
[7:0] STRENGTH_THRESHOLD:
[7] RESERVED
[7] RESERVED
[6] EVR:
6
6
6
0X30 - 0x3B
R/W
0x08
Touch variance setting.
Setting TVR between 0-99
A high TVR value decreases sensitivity of the sensor, but increasing its tolerance to ambient
noise
A small TVR value increases the sensitivity.
0x40
R/W
0x04
Environmental variance setting.
EVR is used to detect "Non-Touch" condition
0x50 - 0x57
R/W
0x01
Strength threshold.
Setting threshold to be used in AFS mode to determine valid touch
5
5
5
4
4
4
STRENGTH_THRESHOLD
Doc ID 14478 Rev 5
3
3
3
TVR
TVR
2
2
2
Environmental variance
Touch variance setting
1
1
1
Strength threshold
STMPE821
0
0
0