USR-WIFI232-A/B/C User Manual
http://www.usriot.com
Jinan USR IOT Technology Limited
Page 23 of 93
Figure 18
Ethernet
Ethernet
Ethernet
Ethernet Reference
Reference
Reference
Reference Design
Design
Design
Design with
with
with
with Transformer
Transformer
Transformer
Transformer
3.5.2.2 Ethernet Connection without Transformer
For this application, Ethernet will work as internal data transmition interface and save one
transformer and RJ45 connector. Ethernet PHY-to-PHY connection will use AC coupled
connection. This is a space and cost optimized solution. Hardware reference design as following:
Note: VCC signal at reference design shall base on user board PHY chipset voltage level, such
as 2.5V power supply for general Ethernet PHY chipset.
(Above is for USR-WIFI232-A/B pin type module, Below is for SMD type USR-WIFI232-C)
