USR IOT USR-WIFI232-T, User Manual

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Low power WIFI module user manual http://en.usr.cn
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1.2. Hardware Introduction
1.2.1. Pins Definition
Figure 1. USR-WIFI232-T Pins Map
Table 2 USR-WIFI232-T Pins Definition
Pin Description Net Name Signal
Type
Comments
1 Ground GND Power
2 +3.3V Power DVDD Power 3.3V@250mA
3 Restore
Configuration
nReload I,PU Detailed functions see <Notes>
4 Module Reset EXT_RESETn I,PU “Low” effective reset input.
5 UART0 UART0_RX I GPIO5, No connect if not use.
6 UART0 UART0_TX O GPIO6, No connect if not use.
7 Power Control
Switch
PWR_SW I,PU “0” – Power Down Mode(Lowest
Power Consumption)
“1” – Normal mode
8 PWM Channel 3 PWM_3 I/O Can be configured as WPS/GPIO18
No connect if not use.
9 PWM Channel 2 PWM_2 I/O Can be configured as
nReady/GPIO12.
No connect if not use.
10 PWM Channel 1 PWM_1 I/O Can be configured as
nLink/GPIO11.
Detailed functions see <Notes>
<Notes>
nReload Pin (Button) function
：
1. When this pin is set to “low” during module boot up, the module will
enter wireless firmware and config upgrade mode. This mode is used
for customer manufacture.
(USR Technology will provide software tools for customer batch
configuration and upgrade firmware during mass production)