Title: RGMII voltage levels [Print This Page] Author: calypso Time: 4/1/2022 18:40 Title: RGMII voltage levels Hello.
Can anybody comment on the issue regarding RGMII voltage levels?
What I mean is the schematic MB-JM3-RK3568-V11-20210412.pdf
The signals GMAC1_TXD0_M1, GMAC1_TXD1_M1 are based on the 3,3V power domain.
On the other hand the signals GMAC1_TXD2_M1, GMAC1_TXD3_M1 are based on the 1,8V power domain.
And all these four signals are wired directly to the U28 RTL8211F-CG.
As we can see the RTL8211F-CG is configured as "RGMII Power Source = 1,8V (default)".
So, is it possible to use RGMII TX 3,3V-levels with RTL8211F-CG 1,8V powered IOs?Author: calypso Time: 4/1/2022 20:55
Solved.
Dear support (if you exist at all).
Kindly look for the mistakes in the Core-3568J Product Specification.pdf (V1.0).
It contains wrong "IO Power domain" values in the table.
Author: zyk Time: 4/6/2022 14:50
sorry, the io is 1.8V. please refer to Product SpecificationV2.1
https://download.t-firefly.com/% ... A6.pdf?v=1620639527Author: carinamon Time: 5/7/2025 11:55
In Sprunked, players craft music using creepy sound effects, unsettling beats, and spooky character designs, creating an immersive experience that¡¯s both thrilling and creative.Author: helengrace Time: 5/8/2025 15:55
There¡¯s something deeply satisfying about shaving off 0.01 seconds in Speed Stars. It¡¯s a game of inches, timing, and perfect execution ¡ª and it never gets old. Author: devotedannual Time: 5/12/2025 12:43
RGMII employs LVTTL or LVCMOS signals, which are digital signals with low logic voltages. 3.3V, 2.5V, or 1.8V, depending on the chip architecture or FPGA/ASIC platform utilized. However, many modern systems choose 1.8V to reduce power consumption and electromagnetic interference (EMI).
Welcome Firefly Open Source Community (https://bbs.t-firefly.com/)
