Hardware Reference Design; Hardware Typical Application - Waveshare WIFI232-B2 User Manual

WIFI232-B2 User Manual

3.5 Hardware Reference Design

3.5.1 Hardware Typical Application

Figure 12 WIFI232 Hardware Typical Application
Note:
nRST- Module hardware reset signal. Input. Logics "0" effective
There is 100K Ohm pull-up resister internal up to 3.3V. When module power up or
some issue happened, MCU need assert nRST signal "0" at least 300ms, then set "1" to
keep module fully reset
nReadt- Module boot up ready signal. Output. Logics "0" effective.
There is 4.7K Ohm pull-up resister internal up to 3.3V. Then module will output "0" or
"Heartbeat Signal" after normal boot up. This signal used to judge if module finish boot
up and ready for application or working at normal mode
nLink- Module WIFI connection indication. Output
There is 4.7K Ohm pull-up resister internal up to 3.3V. When module connect to AP or
some WIFI STA connect to module (AP mode), the module will output "0". This signal
used to judge if module already at WIFI connection status.
nReload- Module restore to factory default configuration. Input. Logics "0" effective
User can assert nReload signal "0" more than 3's through button or MCU pin, then
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