USR-K1 User Manual www.usriot.com
Jinan USR IOT Technology Limited 17 / 29 [email protected]
No.
Pin
Function
Descriptions
1
ISP
Update pin
This pin to ground to the module power module can be
upgraded.If you do not use, can be suspended.
2
N/C
N/C
N/C
3
LINK
Can be used as a network connection status indicator pin
4
RST
RESET
Pin received 200ms low to reset the whole module.
If you do not use, can be suspended.
Note: The module is powered automatic reset, it is
recommended that connect the MCU IO port, reset the MCU
control module in a particular case.
5
485_EN 485 enable
Can be used as RS485 enable pin
6
CFG
Serial ports
Configuration pins
Low, you can use the serial port module configuration.
Normal working hours left floating or tied HIGH.
Note: give the power module, and then pulled down the CFG
pin to enter the serial configuration state.
7
LED2
Network data
instructions
Connect to 13
8
RXD
Module data is
received
Data receiving end of the module, TTL 3.3V microcontroller
9
TXD
Module data
transmission
Data transmission end of the module, TTL level can be
connected to 5V or 3.3V microcontroller
10
GND
Signal ground
GND
11
VCC
Power supply
Power supply: 3.3V @ 200mA
12
LED1
Network connection
status indicator
Connect to 16
13
LED2
Network data
instructions
Connect to 7
14
LED_3.
3
Network led power
Power 3.3V
15
LED_3.
3
Network led power
Power 3.3V
16
LED1
Network connection
status indicator
Connect to 12
Diagram 4-3 I/O introduce
4.3 Hardware to RJ45 Light