Hello,
Our Ethernet PHY is DP83822I and we want to use this external phy with RMII mode.
/*******************************************/
The Read Register Values :
Register 0x0001 -> 0x3100
Register 0x0002 -> 0x2000
Register 0x0004 -> 0x01e1
Register 0x0009 -> 0x0000
Register 0x0010 -> 0x1002
Register 0x0011 -> 0x0108
Register 0x0012 -> 0x4000
Register 0x0013 -> 0x4a00
Register 0x0017 -> 0x0061
Register 0x0019 -> 0x8021
Register 0x0462 -> 0x0300
Register 0x0467 -> 0x0fe3
Register 0x0468 -> 0x0000
/*******************************************/
First of all i perform bootstrap (mode 3) and the phy start with RMII mode(0x017 - Bit 7 = 1), then i set Register 0x0462 as 0x4300(RX_D3 pin as 50 mhz clock). But there is no clock signal on RX_D3 pin.
If i set Register 0x0462 as 0x2300(RX_D3 pin as 25 mhz clock), i observe the 25 mhz clock. Even if [14:12] bits of IOCTRL/0x462 Register is set as 011(reserved state), it is possible to see a 62 mhz clock signal. But it does not produce 50 mhz or more than 50 mhz clock from RX_D3 pin.
Do you have any idea?Thanks in advance.
Best Regards,
Gökçe ALPARSLAN
