10/100M Ethernet Interface - Waveshare WIFI232-B2 User Manual

WIFI232-B2 User Manual
release, module will restore to factory default configuration and re-start boot up
process. User need add 4.7K~10K Ohm pull-up resister external the module
UART_TXD/RXD- UART port data transmit and receive signal

3.5.2 10/100M Ethernet Interface

WIFI232 modules provide one 10/100M Ethernet PHY layer interface for data
transition. This Ethernet support with transformer and without transformer (PHY-to-
PHY) 2 kinds of connection
3.5.2.1 Ethernet Connection with Transformer
User board put Ether transformer and RH-45 connector. This is a general 10/100M
Ethernet PHY layer connection. The reference design as following:
3.5.2.2 Ethernet Connection without Transformer
For this application, Ethernet will work as internal data transmission 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 followingL
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.
Figure 13 PHY Layer Connection Reference Design
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