USR-WIFI232-A/B/C User Manual
http://www.usriot.com
Jinan USR IOT Technology Limited
Page 16 of 93
can be configured as
GPIO pins, and can
change
GPIO
pin
status
through
AT
command
5
UART Data Receive
UART_RXD
I
GPIO
GPIO4
I/O
6
UART sends request of
data transmission
UART_RTS
O
GPIO
GPIO5
I/O
7
UART
receives
data
transmission permission
UART_CTS
I
GPIO
GPIO6
I/O
8
Ethernet
O
+1.8V Ethernet Data
Interface(Module with
external
1.8V
reference voltage)
9
Ethernet output-
PHY_TX-
O
10
Ethernet Input+
I
11
Ethernet Input-
PHY_RX-
I
14
WiFi status Indication
nlink
O
“0”- WIFI connection
available, “1”- No WIFI
connection.
15
Module reset signal
nRST
I
“Low ( 0 )” effective
reset input.
The
reset
duration
should be kept more
than 300ms
16
Indicate
the
module
status
of
power
on
process
nReady
O
“0” - Finish module
boot up process;
“1” - Module boot up
not finish.
17
Restore configuration
nReload
I
Module
will
Restore
factory
default
configuration after set
this pin “0” more than
1s, then set “1”.
21
UART1 Data Receive
NC
NC
22
UART1 Data Transmit
NC
NC
23
Output 1.8V
1.8V
O
1.8V@300mA, to the
Eth application
25
2.4GHz Antenna
ANT
O
50ohm
impedance
control line
12,13
Retain
NC
NC
3.2
3.2
3.2
3.2 Mechanical
Mechanical
Mechanical
Mechanical Size
Size
Size
Size
USR-WIFI232-A/B/C modules physical size (25x40mm) as follows:
3.2.1
USR-WIFI232-A/B
USR-WIFI232-A/B module Mechanical Size:
