AS7038RB datasheet(106/127 Pages) AMSOSRAM

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AS7038RB

Functional Description

Datasheet

• PUBLIC

DS000726

• v2-00 • 2021-Jun-02

126

│ 105

FIFOSTATUS (Address 0xa4)

Figure 141:

FIFOSTATUS Register

Addr: 0xa4

FIFOSTATUS

Bit

Bit Name

Default

Access

Bit Description

7:1

Not used

Fifo overflow

FIFO overflow indicator

FIFOLEVEL (Address 0xa6)

Figure 142:

FIFOLEVEL Register

Addr: 0xa6

FIFOLEVEL

Bit

Bit Name

Default

Access

Bit Description

7:0

FifoLevel

FIFO fill level (0..128)

FIFOL (Address 0xfe)

Figure 143:

FIFOL Register

Addr: 0xfe

FIFOL

Bit

Bit Name

Default

Access

Bit Description

7:0

fifol

PUSHPOP

Low byte of FIFO

FIFOL can be read out with single reads (2 consecutive I²C addresses have to be read to get one

FIFO entry) or with block-read (up to 2 x fifo_depth values can be read in a single block-read)

Upon reading of FIFOH, it automatically advances the internal read pointer and decreases FIFO level.

If reading beyond end of FIFO, data will return 00h. There is no underrun flag, this is not an error

condition.

Use ams SDK functions to read from the FIFO register to keep the reading in synchronization with the

ADC channel selection. If synchronization is no concern use [fifoh[7:0] : fifol[7:2]] as ADC result as the

ADC data is multiplied by x4 before it is pushed in to the FIFO. FIFOl[0] is used as an ADC first

channel indication. The first channel indication bit toggles upon every new entry unless the first ADC

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