STMPE812ABJR datasheet(15/53 Pages) STMICROELECTRONICS

Part #	STMPE812ABJR

Description	Integrated 4-wire resistive touchscreen controller, pen-down/real-time mode, fullyautonomous

PDF	53 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 53 page

STMPE812A

Power modes

Doc ID 18225 Rev 4

15/53

Power modes

The STMPE812A operates in a 2 states: active and hibernate.

Active:

–

Whenever PEN-DOWN is detected, the device remains in active mode

–

Whenever PWM is active, the device remains in active mode

–

Whenever ADC is active, the device remains in ACTIVE MODE

Hibernate:

-PWM/ADC must be “off” (clock disable bit SET)

-Any GPIO input, with interrupt enabled, causes a transition to “active” state, if an input

change is detected.

-Pen down even causes transition to “active” state if the touchscreen controller is enabled.

Table 6.

Power mode

Active

Hibernate

Current consumption

280 µA (max)(1)

At Vcc=1.8V, TCS running at 100sets of X/Y per second, MAV disabled.

1.0 µA (max.)

GPIO hotkey

Yes

Touchscreen

Yes

Interface (I2C)

Yes

STMPE812ABJR Datasheet(PDF) 15 Page - STMicroelectronics