AS72651 datasheet(20/66 Pages) AMSCO

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AS72651 − Detailed Description

Reset

Pulling down the RESN pin for longer than 100ms resets the

AS72651 which proceed to reset the AS72562 and the same

RESN signal shown below can be used directly to reset the

AS72653.

Figure 22:

Reset Circuit

AS7265x LED_IND Controls

There are LED_IND pins on all AS7265x devices. An LED con-

nected to LED_IND can be used as a general power indicator

and will automatically be used to indicate a Flash firmware up-

date is occurring.

During a firmware update of the AS72651 via an external SD

card the indicator LED starts flashing (500ms pulses). When pro-

gramming is completed the device re-starts and the indicator

LED stops flashing. The LED_IND can then be setup as needed.

Each AS7265x LED_IND source can be turned on/off via AT com-

mands or I²C register control, and LED_IND sink current is pro-

grammable to 1mA, 2mA, 4mA or 8mA. This LED_IND control

can also be used in applications just like the LED_DRV control

(described below), if the lower current sink of the LED_IND con-

trol is appropriate.

Electronic Shutter with AS7265x LED_DRV

Driver Control

There are LED_DRV pins on all AS7265x devices. The LED_DRV

pin can be used to control external LED sources as needed for

sensor applications. LED_DRV can sink a programmable current

of 12.5mA, 25mA, 50mA or 100mA. The control can be turned

on/off via I²C registers or AT commands, and as such it provides

the AS7265x device with an electronic shutter.

Reset

AS72651

Spectral_ID

Engine

RESN

Push > 100ms

VDD

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