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AS8579

Functional Description

Datasheet

• PUBLIC

DS000707

• v4-01 • 2022-Jun-08

│ 21

The 0x90 command allows for I and Q data to be read from the same sensor signal sample by doing a

quick read on both I and Q data registers. This command links the I and Q registers together into a

32-bit word. This data is read back using a 40-bit word in this order: command byte, I data word, Q

data word. I/Q data matching is guaranteed using the Quick Read command (i.e.

– I and Q data will be

from a matched sample). The I and Q data registers are reset to 0x00 after reading.

Figure 17:

SPI Example of Read Sensor ID, Write EDIV and Read EDIV Register

ADDR = 0x01

SCLK

MOSI

MISO

Read Sensor ID (Sensor ID = 0xA431)

Write EDIV (EDIV = 0x00 0x01)

Read EDIV (EDIV = 0x00 0x01)

DATA1=0x00

DATA2=0x00

cmd* = 0x01

Data1 = 0xA4

Data2 = 0x31

Sensor repeat command

ADDR = 0x30

DATA1=0x00

DATA2=0x01

cmd* = 0x01

Data1 = 0x00

Data2 = 0x00

ADDR = 0x20

DATA1=0x00

DATA2=0x00

cmd* = 0x01

Data1 = 0x00

Data2 = 0x01

SCLK

MOSI

MISO

SCLK

MOSI

MISO

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