STEVAL-TCS003V1 STMicroelectronics, STEVAL-TCS003V1 Datasheet - Page 58

• Manufacturer Part Number: STEVAL-TCS003V1
• Description: BOARD DEMO EXPANDER STMPE2403
• Manufacturer: STMicroelectronics

Specifications of STEVAL-TCS003V1

• Main Purpose: Interface, GPIO Expander
• Embedded: No
• Utilized Ic / Part: STMPE2403
• Primary Attributes: 8/16/24-Bit 24-Port GPIO Expander over I2C
• Secondary Attributes: 3 8-Bit PWM Output for LEDs, Keyboard Matrix Scan, Special Key Support
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8206

Miscellaneous features
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Miscellaneous features
Reset
STMPE2403 is equipped with an internal POR circuit that holds the device in reset state,
until the clock is steady and VCC input is valid. Host system may choose to reset the
STMPE2403 by asserting Reset_N pin.
Under Voltage Lockout
STMPE2403 is equipped with an internal UVLO circuit that generates a RESET signal,
when the main supply voltage falls below the allowed threshold.
Clock output
STMPE2403 provides a buffered 32KHz clock output at one of the GPIO as alternate
function. This clock could be used for cascading of multiple port expander devices, using
just 1 XTAL unit.
Crystal oscillator
STMPE2403 provides the option to use a crystal oscillator to provide the 32KHz clock.
Figure 14. Recommended schematics if external XTAL is used
S T M P E 2403
X TA L O U T
X TA L IN
32K H z
27pF
27pF
G N D
STMPE2403