ADV7481WBBCZ datasheet(17/22 Pages) AD

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Data Sheet

ADV7481

Rev. 0 | Page 17 of 22

POWER SUPPLY RECOMMENDATION

POWER-UP SEQUENCE

Adhere to the absolute maximum ratings at all times during

power-up (see Table 6). The power-up sequence for the

ADV7481 is as follows:

Assert RESET (pull the pin low).

Power up the 3.3 V supplies (DVDDIO and TVDD). These

supplies must be powered up simultaneously.

Power up the 1.8 V supplies (DVDD, CVDD, PVDD, MVDD, and

AVDD). These supplies must be powered up simultaneously.

RESET can be deasserted (pulled high) 5 ms after all

supplies are fully powered up.

After all power supplies and the RESET pin are powered up

and stable, wait an additional 5 ms before initiating I2C

communication with the ADV7481.

POWER-DOWN SEQUENCE

The ADV7481 power supplies can be deasserted simultaneously

as long as a higher rated supply (for example, DVDDIO) does not

fall to a voltage level less than a lower rated supply (for example,

DVDD), and the absolute maximum ratings specifications are

followed.

Figure 13. Supply Power-Up Sequence

3.3V SUPPLIES

RESET

3.3V

1.8V SUPPLIES

1.8V

3.3V

RESET > 5ms

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