Multifunctional serial to Ethernet module user manual
www.usriot.com
Jinan USR IOT Technology Co., Ltd
Page23
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9
4.1.3.
4.1.3.
4.1.3.
4.1.3. LED
LED
LED
LED status
status
status
status
besides Link and Data LED of RJ45, there is one work LED pin interface reserved on board.
ID
name
Description
1
Work
Just interface pin, have no LED on module,
If you need it, take this pin with LED and 510 ohm
resistor to GND.
2
Link(green)
On RJ45, when ethernet physical link established, on.
3
Data(yellow)
On RJ45, wnen ethernet data communicate, twinkle.
Diagram 4-4 LED definition
4.1.4.
4.1.4.
4.1.4.
4.1.4. Serial(TTL)
Serial(TTL)
Serial(TTL)
Serial(TTL) interface
interface
interface
interface
There is 2 serial port on TCP232-E2, only UART0 have 485_en pin.
The serial port is 3.3V TTL level (2 * TTL serial port, can be directly connected to customer's
MCU).
name
Description
TXD0
Uart0 transmit data pin
RXD0
Uart0 receive data pin
CTS0
Default unused. (can be configured as Uart0 clear
to send)
RTS0
Default as 485_en for UART0, (can be
configured as Uart0 require to send)
RXD1
Uart1 receive data pin
TXD1
Uart1 transmit data pin
Diagram 4-5 connector interface
