AS3412 datasheet(36/84 Pages) AMSCO

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[v1-00] 2016-Apr-06

AS3412 − Detailed Description

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

powers up the AS3512. Once the device is running, a long key

press (~2.4 seconds) shuts the device down. As long as the

device is active a short key press enters monitor mode. The

monitor mode can be deactivated with a second, short key

press. 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 setting the bit DISABLE_

MONITOR in register 0x15. The typical connection of the push

button to the AS3412 is shown in Figure 47.

Figure 47:

Push Button Mode

Push Button Mode: The diagram shows the external connection of the switches and push button in slider mode.

Figure 48:

Push Button Timing Diagram

Push Button Mode Timing Diagram: The diagram shows the necessary voltages and timings for different

operation modes in Push Button configuration.

MODE/CSCL

ANC/CSDA

Control Logic

VBAT

ANC

PBO

22kΩ

ON/OFF/MONITOR

MODE/CSCL Pin

OFF

MONITOR

OFF

>2ms

>24ms

>2.4s

>65% VBAT

<35% VBAT

Operation Mode

AS3412 Datasheet(PDF) 36 Page - ams AG

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