STEVAL-ICB002V1 STMicroelectronics, STEVAL-ICB002V1 Datasheet - Page 10

• 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

STMPE821 functional overview
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Power management
The STMPE821 operates in 3 states.
Figure 4.
On RESET, the STMPE821 enters the ACTIVE state immediately.
Upon a fixed period of inactivity, the device enters into the SLEEP state. Any touch activity in
SLEEP state would cause the device to go back to ACTIVE state.
In SLEEP mode:
-Calibration continues if F2A bit is set in CONTROL register
-Calibration stops if F2A bit is NOT set in CONTROL register
If no touch activity is expected, the host may set the device into HIBERNATE state to save
power.
If any key is touched and held, the I
hold, until the key has been released.
STMPE821 operating states
Doc ID 14478 Rev 5
2
C command to enter sleep or hibernate will be put on
STMPE821