AS7000 datasheet(41/92 Pages) AMSCO

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ams Datasheet

Page 41

[v1-12] 2018-Feb-26

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AS7000 − Detailed Description

Optical Signal Conditioning Registers

Figure 53:

AFE_SC_CFG

0x70: AFE_SC_CFG

Field

Name

Rst

Type

Description

sd_pol_init

The low level driver shall ensure that this register is 0 if one

of the seq_sdm pulses is first, and is 1 if the seq_sdp is first

within a sequence.

25:24

aa_freq

Anti-aliasing filter cut-off frequency

Setting

Signal

010kHz

120kHz

240kHz

360kHz

20:13

sd_subs

Synchronous demodulator subsampling ratio between

sequencer frequency and ADC sampling frequency.

ADC-Fsample = Sequencyer_Frequency/(sd_subs+1)

When setting to 0, then in every sequencer iteration the

ADC will run.

When setting to 1, then the first sequencer iteration will

not trigger the ADC, but the second one will.

Setting to N will make N iterations without ADC, followed

by one iteration with the ADC measurement executed.

It is recommended to use the ADC interrupt in this case

and not the sequencer interrupt.

12:11

sd_bw

Synchronous demodulator low pass filter.

Setting

Frequency

010Hz

120Hz

240Hz

380Hz

hp_en

0...Power down of the high pass filter

1...Enable high pass filter

9hp_byp

0...HP filter is used

1...HP filter is bypassed

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