• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 658 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Gigabit Ethernet connectivity between two AM389x processors using EMAC to EMAC

Rinzai Bell
Intellectual 605 points

I am trying to connect two AM389x processors using the EMACs:

 

Can you help resolve these questions:

 

1)      Is the phy in the new AM389x equivalent to that used in the DM6467?

2)      What are the details for using the EMACs for MCU to MCU Communication?

3)      Does EMAC_CRS get tied to GND or does it tie to the same MCUs RXDV?

MPU 1

Direction

MPU 2

Notes

EMAC Module

 

 

 

EMAC_TXCLK

I

Unused on both

EMAC_GMTCLK

O

EMAC_RXCLK

Cross Clocks

EMAC_TXD[0-7]

O

EMAC_RXD[0-7]

Crossed data

EMAC_TXEN

O

EMAC_RXDV

Cross ETn/RVa

EMAC_COL

I (GND)

Ground Both

EMAC_CRS

I (???)

GND or EMAC_RXDV_1

Please see attached diagram

EMAC_RXCLK

I

EMAC_GMTCLK

Cross Clocks

EMAC_RXD[0-7]

I

EMAC_TXD[0-7]

Crossed data

EMAC_RXDV

I

EMAC_TXEN

Cross ETn/RVa

EMAC_RXER

I (GND)

Ground Both

 

 

 

 

MDIO module

 

 

 

MDIO_MCLK

O

Unused

MDIO_MDIO

I/O

Unused

 

 

 

 

 

 

 

 

 

 

 

Please see:

Inter-DM6467 Communications Using Direct GMII Connections (RandyP)

SMTS FAE

http://e2e.ti.com/cfs-file.ashx/__key/CommunityServer-Discussions-Components-Files/717/2480.Inter_2D00_DM6467-Communications-Using-Direct-GMII-Connections-E2E-.pdf

Thanks,

 

Rinzai Bell