WAVESHARE ELECTRONICS
WIFI232 User Manual
Page 19 of 81
User can assert nReload signal “0” more than 3‟s through button or MCU pin, then 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.
There is 1K Ohm pull-down resister inter
nal. User can‟t add pull-up resister at these pins.
3.5.2 10/100M Ethernet Interface
WIFI232 modules provide one 10/100M Ethernet PHY layer interface for data transition or user
configuration. 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 Ethernet transformer and RJ-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 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.
