The customer is using AM3505AZER with PHY and wants to know the internal pull-up/down register value which is including the variation
Would you please provide it?
There is II : Input current for dual voltage IO pins specification in the data sheet as below. It seems the register is current source. In this case, can we get it by calculation? How to calculate it?
Is the following calculation a correct? I’m not sure the description that Input pins with 100 μA pull-up enable in the data sheet.
- Pull- up
- VDDSHV = 3.3V, Pull-up : 3.3/310=10.6Kohms(Min) 3.3/70=47.1Kohms(Max)
- VDDSHV = 1.8V, Pull-up : 1.8/310=5.8Kohms(Min) 1.8/70=25.7Kohms(Max)
- Pull- down
- VDDSHV = 3.3V, Pull-down : 3.3/270=12.2Kohms(Min) 3.3/75=44.0Kohms(Max)
- VDDSHV = 1.8V, Pull-down : 1.8/270=6.7Kohms(Min) 1.8/75=24.0Kohms(Max)
Thanks and Best regards,