STEVAL-ICB007V1

STEVAL-ICB007V1 Capacitive touch demonstration board based on the STMPE321 Data brief Description The STEVAL-ICB007V1 demonstration board employs STM32-based capacitive touch to demonstrate the functionality and performance of the STMPE321, a 3-channel capacitive touch key controller. Capacitance measurement is implemented in fully optimized hardware, and the 3 I/Os can be configured as either capacitive touchkeys or as GPIOs (general purpose input/output). The device is capable of interfacing with a main digital ASIC/controller through the 2-line communication protocol I2C. In the STEVAL-ICB007V1 demonstration board, the STM32 microcontroller is used as the main digital controller to interface with the STMPE321 Features device. The system utilizes the capacitive touchkey controller of the STMPE321 and PWM STM32 microcontroller is used as the features of the STM32 to demonstrate the main digital controller to interface the application. STMPE321 device The STMPE321 controls 3 different touchkeys STMPE321 device controls 3 different touch keys using an integrated capacitive touch controller. Touch events are indicated on the LEDs using Touch events are indicated on the LEDs the STM32 GPIO pins, and the corresponding RoHS compliant PWM frequency is generated on a separate LED using the STM32 timer. June 2011 DocID018907 Rev 1.0 1/4 www.st.com For further information contact your local STMicroelectronics sales office. Obsolete Product(s) - Obsolete Product(s)Circuit schematic STEVAL-ICB007V1 1 Circuit schematic NC SCL 6 10 INT SDA 5 11 NC RST 4 12 AM09289V1 2/4 DocID018907 Rev 1.0 Obsolete Product(s) - Obsolete Product(s) R1R1 CNCN11 3V3 RST 1V8 SCL SDA 1 2 4.4.7K7K GND 3V3 3 4 BUBUTTTTOONNAA BUTBUTTTOONNBB BUBUTTTTOONNCC INT PB13 TIM1 CH1N 5 6 R1R122 3V3 PB15 TIM1 CH3N R1R133 RST 1 1 1 7 8 DNM PB0 TIM3 CH3 1010KK 9 10 00 R2R2 R3R3 DNM DNM DNM CONCON33 CONCON22 COCONN11 1010KK 1010KK R6R6 INT HHEEADERADER55XX22 1K1K PB1 TIM3 CH4 SCL U1U1 SDA D1D1 CRECREFF 3V3 R4R4 PB13 TIM1 CH1N DNM DNM 1 9 S2 SREF 5p5pFF 222200 C1C1 C2C2 1V8 LELEDD 2222ppFF 22p22pFF 2 8 S1 VCC D2D2 GND R8R8 PB15 TIM1 CH3N 3 7 S0 GND 222200 C8C8 LELEDD C3C3 C4C4 C5C5 1100n00nFF D3D3 5p5pFF 5p5pFF 5p5pFF R9R9 PB0 TIM3 CH3 DNM DNM DNM STSTMMPPEE332211 222200 3V3 1V8 LELEDD D4D4 PB1 TIM3 CH4 R10R10 222200 DNM LELEDD CNCN22 CNCN33 R7R7 R5R5 1010KK 4.4.77KK 1 1 2 2 3 3 4 4 5 5 6 6 7 7 INT 8 8 9 9 10 10 11 11 12 12 13 13 1V8 14 14 15 15 GND C7C7 3V3 U2U2 16 16 1u1uFF 1V8 1 5 17 17 IN OUT 18 18 GND 2 19 19 GND 20 20 3V3 R1R111 3 4 21 21 INHIBITBYPASS 1010kk 22 22 LLDD29298585BMBM1818RR SSOOTT2233--55LL 23 23 C1C100 C6C6 C9C9 24 24 10n10nFF 1010uuFF 10100n0nFF 25 25 26 26 27 27 28 28 29 29 30 30 CONCON3300 COCONN3300