Jinan USR IOT Technology WIFI232-A User Manual page 14

Pin Pin Pin Pin Description Description Description Description
1 1 1 1 Ground--GND
2 2 2 2
VCC 3.3V@350mA
3 3 3 3
UART Data Transmit
GPIO
4 4 4 4 UART Data Receive
GPIO
5 5 5 5
UART sends request
of data transmission
GPIO
6 6 6 6
UART receives data
transmission
permission
GPIO
7 7 7 7 Module reset signal
8 8 8 8
WiFi status Indication
GPIO
9 9 9 9 Indicate the module
status of power on
process
GPIO
10 10 10 10 Restore configuration
GPIO
11 11
11 11 Ethernet Input+
12 12 12 12 Ethernet Input-
Jinan USR IOT Technology Limited
USR-WIFI232-A/B/C User Manual
P H Y_T X+
P H Y_R X+
nR eady/G P I O9
R E S E T
U A R T_R T S/G P I O5
U A R T_T X D/G P I O3
G N D
Figure 8 USR-WIFI232-
USR-WIFI232- USR-WIFI232-
USR-WIFI232-A/B
Table 3 USR-WIFI232-A/B Pins Definition
Name Name Name Name
GND
3.3V
UART_TXD
GPIO3
UART_RXD
GPIO4
UART_RTS
GPIO5
UART_CTS
GPIO6
RESET
nLink
GPIO8
nReady
GPIO9
nReload
GPIO10
PHY_RX+
PHY_RX-
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P H Y_T X-
P H Y_R X-
nR eload/G P I O1 0
n L in k/G P I O8
U A R T_C T S/G P I O6
U A R T_R X D/G P I O4
3.3V
A/B A/B Pins Pins Map Map
A/B Pins Pins Map Map
Directi Directio o o o Directi Directi Note Note Note Note
n n n n
Power Ground
Power 3.3V @ 350mA power input
O If not use UART function,
this 4 pins can be configured
I/O
as GPIO pins, and can
I
change GPIO pin status
I/O
through AT command
O
I/O
I
I/O
I "Low ( 0 )" effective reset
input.
The reset duration should be
kept more than 300ms
O "0"- WIFI connection
available
I/O
"1"- No WIFI connection
Can be configured as GPIO.
O "0" or "Palmodic Signal" -
Finish module boot up
process;
"1" - Module boot up not
I/O
finish.
Can be configured as GPIO.
I Module will Restore factory
default configuration after set
I/O
this pin "0" more than 1s,
then set "1".
I +1.8V Ethernet Data
Interface
I
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