Other Parts Discussed in Thread: TMS320F28388S,
Hi Team,
I designed EtherCAT module with TMS320F28388S.
Reference circuit was MCU063B(003)_Sch. The DP83822 was out of stock, so I opted to use DP83826E.
Unfortunately the designed board was not working. So I have several questions:
1. Circuit design for TD_P and TD_M
- I put the 49.9 resistors with 3.3V. But I found difference point at snla344b.
- is there a difference between DP83288 and DP83826 for TD+ and TD-?
2. Strap configuration
- there was a example for strap pin configuration for EtherCAT [snla344b].
I designed it as below configuration.
strap 0 : 0 --> pull-down 2.49K
strap 1 : 0 --> pull-down 2.49K
strap 2 : 0 [EtherCATport 0] --> pull-down 2.49K
1 [EtherCATport1] --> pull-up 2.49K
strap 3 : 0 --> pull-down 2.49K
strap 4 : 0 --> pull-down 2.49K
strap 5 : 0 --> pull-down 2.49K
strap 6 : 1 --> pull-up 2.49K
strap 7 : 1 --> pull-up 2.49K
strap 8 : 1 --> pull-up 2.49K
strap 9 : 0 --> pull-down 2.49K
strap 10 : 0 --> pull-down 2.49K
pin 1: NC or pull-up --> NC
Can we ask for your help in checking if the strap configuration is correct? Also, how do I connect the TD_P and TD_N?
Thanks in advance!
Kind Regards,
Jejomar
