TLK105 / pull up resistor of MDIO pin

Ryuji

Guru 20090 points

Hello,

According to datasheet P.5, MDIO pull up resistor is 2.2kohms.

Could you please let me know this reason ?

Can we use 1.5kohms as pull up resistor of MDIO ?

Best Regards,

Ryuji Asaka

over 11 years ago

0 Patrick OFarrell over 11 years ago

TI__Mastermind 31600 points

A 1.5 kOhm resistor can be used for the MDIO pull up resistor.

A 2.2 kOhm resistor can also used for the MDIO pull up resistor as a way to reduce the bill of materials. 2.2 kOhm resistors are commonly used as strap resistors for the TLK1xx and DP83xxx Ethernet devices and the MDIO interface operates correctly with a 2.2 kOhm resistor also.

Patrick

0 Ryuji over 11 years ago in reply to Patrick OFarrell

Guru 20090 points

Hello Patrick san,

Thank you for your prompt reply

I understood.

Best Regards,

Ryuji Asaka

Interface

Interface forum

TLK105 / pull up resistor of MDIO pin