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AS3418

Functional Description

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 36

Figure 45:

Slider Mode

The advantage of this mode compared to Full Slider Mode is the automatic hold function of the

Monitor Mode. Once the push button S3 is pressed, the device enters monitor mode. This mode stays

active until the user pushes the button again.

Figure 46:

Slider Mode Timing Diagram

6.8.3

Push Button Mode

Push Button mode allows the user to control the device with a single normally open (NO) push button.

A simple key press (>PWR_UP_BUT_TIME) powers up the AS3418. Once the device is running, a

long key press (>PWR_DOWN_BUT_TIME) the device down. The device features two configuration

registers (PWR_UP_BUT_TIME and PWR_DOWN_BUT_TIME) that allows the user to re-configure

the power up- and power down button press time. Monitor Mode can be activated with a second, short

key press. To avoid unwanted change of operation mode it is also possible to configure the button

press time (MON_TIME) to enter monitor mode. A timing diagram of this function is shown in Figure

48. If the monitor mode function is not desired, it is possible to deactivate the monitor mode by

clearing the bit MON_EN in register 0x0F. The typical connection of the push button to the AS3418 is

shown in Figure 47.

MODE/CSCL

ANC/CSDA

Control Logic

VBAT

22kΩ

OFF

ANC

PBO

22kΩ

MONITOR

MODE/CSCL Pin

OFF

MONITOR

OFF

>=1.65V

VBAT

45% - 55% VBAT

Operation Mode

<0.3V

> PWR_UP_BUT_TIME

> MON_TIME

> SHUTDOWN_DELAY

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