Jinan USR IOT Technology WIFI232-A, User Manual

Page: 24 / 93

USR-WIFI232-A/B/C User Manual http://www.usriot.com
Jinan USR IOT Technology Limited Page 24 of 93 tec@usr.cn
Figure 19
Ethernet
Ethernet Ethernet
Ethernet Reference
Reference Reference
Reference Design
Design Design
Design without
without without
without Transformer
Transformer Transformer
Transformer
This module Ethernet interface default is for the application with transformer connection. If you
need PHY-PHY directly connection, please change the hardware as follows:
1.
1.
1. 1. Weld
Weld
Weld Weld 0
0
0 0 ohm
ohm
ohm ohm resistance
resistance
resistance resistance in
in
in in red
red
red red position
position
position position
2. 2. 2. 2. Remove Remove Remove Remove the the the the component component component component in in in in yellow yellow yellow yellow position position position position
BOT side component TOP side component
Figure 20
Schematic Schematic Schematic Schematic resistance resistance resistance resistance changes changes changes changes
Specific PHY-PHY direct connection reference to user manual chapter 1.3.2.2 application of
Ethernet without transformer and AT+FEPTP command
The command:
AT+FVEW=enable<CR> to open ethernet WAN port function
Remark:
1. Only when ethernet as WAN, this command is needed. Module default LAN port.
2. After this command, make sure module WAN IP and LAN IP in different segment. (Modify the
ALN IP in AP Settings, modify the WAN IP in STA Settings)
AT+FEPTP=on<CR>
Quey/set default ethernet PHY-PHY on/off
AT+FEPHY=on<CR> Open ethernet function permanently
AT+RELD<CR>
Command with “F” need to be affective after AT+RELD
After module reset, command effect, then will not impact by Reload
For user’s design, pls note:
1. Cable connection should be AC coupling, your cable need be pulled up to VCC (fit with PHY
chip level)
2. Cable TX connected to RX. In PHY-PHY direct connection, PHY chip dose not support
direct/ cross self-adaption
3.Your PHY chip on board should better to be forced into 100M work mode