Forum Discussion
Hello @SengKokL_Intel ,
May I ask another more question. Thanks in advance.
I just generated another LL 1G/10G MAC Example , I select " GX Transceiver Signal Integartion Development KIt ", but I found in its *.qsf , there're below :
"
set_instance_assignment -name IO_STANDARD "HSSI DIFFERENTIAL I/O" -to tx_serial_data[*]
set_instance_assignment -name IO_STANDARD "CURRENT MODE LOGIC (CML)" -to rx_serial_data[*]
set_instance_assignment -name XCVR_VCCR_VCCT_VOLTAGE 1_0V -to tx_serial_data[*]
set_instance_assignment -name XCVR_VCCR_VCCT_VOLTAGE 1_0V -to rx_serial_data[*]
"
My wonder is in this example design, why "tx_serial_data[]" uses ""HSSI DIFFERENTIAL I/O", but the "rx_serial_data[]" uses "CURRENT MODE LOGIC (CML)" ?
Should they use the same IO_STANDARD, maybe LVDS or CML ? it's strange ..
Thanks
/Jet