AS7421 datasheet(36/53 Pages) AMSCO

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AS7421

Datasheet

• PUBLIC

DS000667

• v1-00 • 2022-Aug-25

│ 35

10.2.5

CFG_LED Register (Address 0x68)

Figure 35:

CFG_LED Register

Addr: 0x68

CFG_LED

Bit

Bit Name

Default

Access

Bit Description

SET_LED_ON

LED enable

0: LED disabled

1: Enable LED permanently

Note: can only be enabled if PON = “1”. Bit is

automatically cleared with PON = “0”.

LED_OFF_EN

LED off during modulation

0: Normal mode

1: LED is turned off during modulation if LTF_MODE is

set to “10” (one integration before modulation)

5:4

LED_OFFSET

Offset address for programming the values for

LED_MULT. Access succeeded via the address

CFG_LED_MULT.

00: LED_MULT_0 for integration cycle A

01: LED_MULT_1 for integration cycle B

10: LED_MULT_2 for integration cycle C

11: LED_MULT_3 for integration cycle D

2:0

LED_CURRENT

000

LED current configuration per LED driver

000: 50 mA

001: 75 mA

Others: Reserved

10.2.6

LTF_ICOUNT Register (Address 0x69)

Figure 36:

LTF_ICOUNT Register

Addr: 0x69

LTF_ ICOUNT

Bit

Bit Name

Default

Access

Bit Description

7:0

LTF_ICOUNT

Number of spectral measurements

0x00: No measurement

0xFF: 255 measurements in continuous mode

Others: Number of measurements. After every

measurement, LTF_ON is set to “0” internally.

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