ADP1034ACPZ-1-R7 datasheet(31/41 Pages) AD

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Data Sheet

ADP1034

THEORY OF OPERATION

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Rev. 0 | 31 of 41

GPIO Data Channels

The general-purpose data channels are provided as space-saving

isolated datapaths where timing is not critical. The dc values of all

low speed general‑purpose inputs on a given side of the device are

sampled simultaneously, packetized, and shifted across a single

isolation coil. The process is then reversed by reading the inputs on

the opposite side of the device, packetizing the inputs and sending

these inputs back for similar processing. Because of the sampled

nature of this process, the general-purpose data channels exhibit a

sampling uncertainty that resembles 10 μs of peak jitter.

For proper operation of the GPIO channels, refer to Table 16.

Power both MVDD and SVDD2 within the specified input voltage

range for these pins.

Table 16. Truth Table for GPIO Channels

MVDD State

SVDD2 State

xGPIx

MGPOx

SGPOx

Test Conditions/Comments

Unpowered

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Don’t care

Low

During startup

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Don’t care

Low

During startup

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High

Normal operation

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Low

Normal operation

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Don’t care

Hold

Low

Hold means that the current state of the

outputs are preserved

Powered to Unpowered

Powered

Don’t care

Low

Hold

Hold means that the current state of the

outputs are preserved

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