STEVAL-TCS003V1 STMicroelectronics, STEVAL-TCS003V1 Datasheet - Page 22

• 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

System controller
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Autosleep
Host system may configure the STMPE2403 to go into sleep mode automatically whenever
there is a period of inactivity following a complete I2C transaction with the STMPE2403.
This inactivity means there is no intended I2C transaction for the device. For example, if
there is I2C transaction sent by the host to other slave devices, the STMPE2403 device will
still be counting down for the auto-sleep. The STMPE2403 device resets the autosleep
time-out counter only when it receives an I2C transaction meant for the device itself. This
autosleep feature is controlled by the System Control Register 2.
All events that trigger an interrupt (KPC, Rotator controller, Hot-Key) would result in a
transition from SLEEP state to OPERATIONAL state automatically. The wake up can also
be performed through I2C transaction intended for the device.
Keypress detect in the hibernate mode
When in hibernate mode, a keypress detect will cause the system to go into sleep mode.
The sleep clock (32KHz) will then be used to debounce the key to detect a valid key. If the
keypress is detected to be valid, the system staty in the sleep mode. If the key is detected to
be invalid, the system will go back into hibernate mode.
STMPE2403