ADS8699IPWR datasheet(38/74 Pages) TI2

38 / 74 page

A typical timing diagram for three devices connected in a daisy-chain topology and using the SPI-00-S protocol

is shown in Figure 7-23.

Configuration Data: Device 3

Configuration Data: Device 2

SCLK

{SDO-0}1

{SDI}2

{D31}1

CONVST/CS

{SDO}HOST

{SDI}1

B64

B65

B95

B94

B63

B62

{D1}1

B95

B94

B32

B33

B31

B30

B65

B64

B63

B62

B33

B32

{D30}1

{D0}1

{SDO-0}2

{SDI}3

{D31}2

{D1}2

B95

B94

B65

B64

{D30}2

{D0}2

{D31}1

{D30}1

{D1}1

{D0}1

{SDO-0}3

{SDI}HOST

{D31}3

{D1}3

{D30}3

{D0}3

{D31}2

{D30}2

{D1}2

{D0}2

{D31}1

{D30}1

{D1}1

{D0}1

Configuration Data: Device 1

Configuration Data: Device 2

Configuration Data: Device 3

Output Data: Device 3

Output Data: Device 2

Output Data: Device 1

Figure 7-23. Three Devices in Daisy-Chain Mode Timing Diagram

7.4.2 Device Operational Modes

As shown in Figure 7-24, the device supports three functional states: RESET, ACQ, and CONV. The device state

is determined by the status of the CONVST/CS and RST control signals provided by the host controller.

ACQ

CONV

RESET

Power-Up

NVST

isi

)

nve

rsi

RST

isi

)

RST (Falling Edge)

RST

allin

)

Figure 7-24. Device Functional States

ADS8691, ADS8695, ADS8699

SBAS777B – DECEMBER 2016 – REVISED MARCH 2021

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ADS8699IPWR Datasheet(PDF) 38 Page - Texas Instruments

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