Data Sheet

Page 42 ams Datasheet

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AS7265x − Detailed Description

Figure 57:

UART Protocol

AT Command Interface

The microprocessor interface to control the AS72651 Spectral_

ID sensor(s) is via AT Commands across the UART interface. The

AS72651 provides a text-based serial command interface bor-

rowed from the “AT Command” model used in early Hayes mo-

dems.

For example:

The AT Command Interface, shown below provides access to

the Spectral_ID engine’s control and configuration functions.

Figure 58:

AT Command Interface Block Diagram

Read DATA value: ATDATA → <data>OK

Set the gain of the sensor to 1x: ATGAIN=0→ OK

Start Bit

D1 D2 D3 D4 D5 D6

D7 D0

D1 D2 D3 D4 D5 D6

D7 D0

Tbit=1/Baude Rate

Stop Bit Next Start

Sample Points

Start Bit detected

After Tbit/2: Sampling of Start Bit

After T

bit

: Sampling of Data

Always Low Always High

Data Bits

AT Command Interface

Spectral_ID

Engine

Command

Interface

MCU

AS72651

AT Command Interface

AT Commands