STMPE1601 datasheet(22/58 Pages) STMICROELECTRONICS

Il numero della parte	STMPE1601

Spiegazioni elettronici	16-bit enhanced port expander with keypad and PWM controller Xpander Logic

PDF	58 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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Clocking system

STMPE1601

22/58

8.2

Power mode programming sequence

To put the device in sleep mode, the following needs to be done by the host:

–

Write a '1' to bit 4 of the SYS_CTRL register.

To wake up the device, the host is required to:

–

Assert a wakeup routine on the I2C bus by sending the Start bit, followed by the

device address and the Write bit. Subsequently, proceed with sending the Base

up upon receiving the correct device address and in Write direction. In other

words, the procedure of waking up the device is performed by just sending an I2C

transaction to the device. This procedure can be extended to wake up the device

that is in hibernate mode.

To do a soft reset to the device, the host needs to do the following:

–

Write a '1' to bit 7 of the SYS_CTRL register. This bit is automatically cleared upon

reset.

To go into Hibernate mode, the following needs to be done by the host:

–

Set the Disable_32K bit to '1'

To come out of the Hibernate mode, the following needs to be done by the host:

–

Assert a system reset

–

or put a wakeup on the I2C

STMPE1601 Scheda tecnica(PDF) 22 Page - STMicroelectronics