Communication Interface

Interfaces

Smart LCD provide 5 kind of communication interface which depends on model. Some of the model provide more than one interface.

RS-232C interface

• the major application interface in TOPWAY Smart LCD Series
• provides versatile on screen UI function features of TOPWAY Smart LCD
• receives command from host motherboard and provides response
• uses standard RS-232C signaling
• TOPWAY serial commands protocol (same as UART interface)

UART interface

• available as an individual TOPWAY Smart LCD product
• provides the same versatile on screen UI features
• uses 3.3V logic levels UART signaling
• TOPWAY serial commands protocol (same as RS-232C interface)

RS-485 MODBUS Host interface

• available as an individual TOPWAY Smart LCD product
• provides the same versatile on screen UI features
• working as a MODBUS host device
• uses standard RS-485 signaling
• with MODBUS protocol
• support programable script to access (R/W) MODBUS slave devices

RS-485 MODBUS Slave interface

• available as an individual product of TOPWAY Smart LCD
• provides the same versatile on screen UI features
• uses standard RS-485 signaling
• with MODBUS protocol
• support direct mapping the MODBUS address with internal VP_N16 variable

Ethernet interface

• available as an individual product of TOPWAY Smart LCD
• provides the same versatile on screen UI features
• uses standard ethernet signaling
• with TCP/IP protocol
• accept TOPWAY serial commands

Interface Terminal

There are mainly two terminals on a Smart LCD

• Power supply and signal terminal for operation
• USB terminal for pre-load display project

Power Supply and Signal Terminal for operation

outlook	terminal type	Pinout
	10pin FFC terminal (P1.0)	1-3:VDD, 4:NC, 5:Rx, 6:Tx, 7:NC, 8-10:GND
	8pin header (P2.5)	1-2:VDD, 3: NC, 4:Tx, 5-6:Rx, 7-8:GND
	6pin header (P3.5)	Pins defined for RS232C/RS485/UART and power supply (Please refer to products handbook)
	6pin TH (P3.5)	Pins defined for RS232C/RS485/UART and power supply (Please refer to products handbook)
	10pin TH (P2.0)	1-3: VDD, 4:NC, 5:Rx, 6:Tx, 7:NC, 8-10:GND
	8pin header (P2.0)	1-2:VDD, 3:NC, 4:Tx, 5-6:Rx, 7-8:GND
	LAN header (RJ45)	Standard Ethernet (not support POE) for display project update via network. Power should be supply externally.

note.

• Terminals shows here are standard terminal for Smart LCD. Please refer to the product user manual for details (No customized product)
• Be aware the signal leveling for Rx and Tx. RS232 signal can damage UART terminal device. Miss-matched signal level is not allowed.
• Please re-confirm the power supply voltage before power on the Smart LCD.