990.014 MuIn LCD - Datasheet [EN]

MuIN LCD Board is a multi-interface LCD display controller compatible with HD44780 chipset and similars.

Main Features

• Available connections modes: USB, UART, RS485
• External power supply or by USB port
• Backlight control
• Commands set compatible with Matrix Orbital displays
• Xbee support on-board
• Piezo-speaker on board with variable tones
• General purpose inputs (can be used for button connection)
• Up to 5 A/D channels with 10 bit resolution
• USB Bootloader for easy software update

Applications

• Generic data display
• Remote consolle
• Remote alphanumeric terminal

MuIN LCD doesn't need to be programmed! It operates like a serial remote terminal: data received are displayed directly on the LCD and the carriage return is automatic at the end of a row. A set of useful commands is available to get the full control of the board.

The MuIN LCD is not only capable to display simple text! Following command sets are available:

• Speaker: it can play a 4KHz standard tone or an user-defined tone
• Backlight control: the backlight can turned off or on with intensity adjustment
• Up to 6 general purpose inputs, TTL and CMOS compatible
• Up to 5 A/D channels with 10 bit resolution
• Xbee slot: can be used for the connection of other compatible boards

Technical specifications

• Power supply: from 6 to 9Vdc
• Current consumption: 60mA (backlight off) - 200mA (backlight on at full intensity)
• USB port 2.0 full speed, CDC device with serial port emulation, XP/Vista/Win7 compatible with provided driver (can be downloaded below). Linux uses native driver (Linux could be need an update)
• RS485 port with line terminator, 120Ohms, jumper-selectable bias
• UART TTL and CMOS 3.3V compatible, TTL level output

Only one serial communication method can be selected by using the dedicate jumper:



USB port doesn't need any selection and can be used also for LCD and XBee power supply. The backlight intensity can be adjusted by software, the contrast is adjusted by a trimmer.

On-board there are two 22Ohm resistors used to limitate the LCD backlight current, if your display is already equipped with current-limitation resistors, the on-board resistors can be excluded by soldering a jumper for each resistor in order to obtain the right light intensity.

Display connector pinout

The display connector follows the standard used by the most of HD44780-based LCD Display. Only 4 data line are used (4bit mode):

• GND: common ground
• V+: 5Vdc power supply
• Vc: contrast adjustment
• RS: register select
• RW: Read/Write
• EN: Enable
• D4: data bus, bit 4
• D5: data bus, bit 5
• D6: data bus, bit 6
• D7: data bus, bit 7
• A: backlight led's anode (+)
• K: backlight led's cathode (-)

UART connector pinout

• +5V: 5Vdc out, 100mA MAX
• Rx: serial data in
• Tx: serial data out
• GND: common ground

RS485 connector pinout

• A: 'A' terminal for RS485
• B: 'B' terminal for RS485

Soldering Jumpers

• P+: Positive bias RS485 (default: open)
• P-: Negative bias RS485 (default: open)
• TE: RS485 line terminator (default: open)
• SPK EN.: Speaker enable (default: closed)

Jumpers for function selectionLeds

• RSSI: is turned on on Xbee data receive
• ASSOC: flashes when XBee is ready
• L1: slow flash indicates status ok, full turned on if MuIN is busy
• L2: flashes when data are received or during command execution