DS90UB921-Q1: PDB input hight level

Kuramochi Tadahiko

Guru 28715 points

Part Number: DS90UB921-Q1

Hi,

Could you tell me high level input voltage of PDB when VDDIO=1.8V?

It is specified when VDDIO=3.3V as below.

I guess that this doesn't depend on VDDIO, because PDB is connected VDD33 via pull up register on EVM.

Best Regards,

Kuramochi

0 Hamzeh Jaradat over 7 years ago

Hello Kuramochi-san,

PDB should not be pulled to VDDIO, it should be pulled to VDD33 (3.3V). PDB can be pulled to VDDIO if this is 3.3V (NOT 1.8V)

Low level input voltage for PDB = 0.8V

High level input voltage for PDB = 2V

for more details refer to D/S page 17 and 45.

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