topic TJA1105 test mode 1 in MPC5xxx

TJA1105 test mode 1

chaoy — Fri, 08 May 2020 12:15:53 GMT

The test mode 1 don`t work. My configuration is blow

write register:

Extended control register (Register 17) : 0x1846

Configuration register 1 (Register 18) :0x810

Basic control register (Register 0) : 0x2110

It means the bit LINK_CONTROL is disable.The test mode is 100BASE-T1 test mode 1

I read the register after i write it, it shows i had write successfully.

but i hadn`t detect the clock signal at TXC and RXC , i hadn`t either detect any data at the RXD[0:3],why?

I am not sure whether my configuration is right.

can you give me some suggestions?

Bulat — Mon, 11 May 2020 17:36:50 GMT

I do not know what is "TJA1105". Can you clarify correct part number?

Regards,

Bulat

chaoy — Tue, 12 May 2020 00:57:26 GMT

I make a mistake,the type is TJA1100

Bulat — Tue, 12 May 2020 12:02:29 GMT

Check EN pin with a scope, the PHY should output TX clock at that pin during test mode.

Regards,

Bulat