STEVAL-ICB002V1 STMicroelectronics, STEVAL-ICB002V1 Datasheet - Page 34

• 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
CALIBRATED_IMPEDANCE
Address:
Type:
Reset:
Description:
IMPEDANCE
Address:
Type:
Reset:
Description:
TINT_PENDING
Address:
Type:
Reset:
Description:
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7
7
7
[7:0] CALIBRATED IMPEDANCE:
[7:0] IMPEDANCE:
[7:4] RESERVED
[2:0] RESERVED
[3] EOC:
6
6
6
0x70 - 0x77
R
0x00
Calibrated impedance is a reference value maintained by the device.
Calibrated reference impedance
0x80 - 0x87
R
0x00
Impedance is the instantaneous impedance value seen at the input pin of each cap.
sensing pin.
Currently sensed impedance. This impedance reading decreases with the increase of the
capacitance at sensing channel.
When this register reads 0x7F, reference capacitance should be reduced.
When this register reads 0x00, reference capacitance should be increased.
0x92
R/W
0x00
Reflects the status of each interrupt source.
End of calibration
RESERVED
5
5
5
Doc ID 14478 Rev 5
4
4
4
CAL_IMPEDANCE
IMPEDANCE
EOC
3
3
3
2
2
2
Calibrated impedance
RESERVED
Interrupt pending
1
1
1
Impedance
STMPE821
0
0
0