MemoryLCD.md

Sharp Memory LCD

• KEYWORDS: Module,SPI,Graphics,Graphics Driver,LCD,Monochrome,LS013B7DH03,LS027B7DH01,Memory LCD,PNLC,HR-TFT

Sharp Memory LCDs are high pixel density, low power displays that don't need backlights. They draw in the region of 100uA while idle, so are perfect for always-on, battery-powered applications.

Wiring Up

Display	Espruino	Function
GND	GND	GND
Vin	3.3	Power In (Supposedly the 2.7" LCD needs 5v, but it appears to work off 3.3v)
SCLK	B3	SPI SCK
SI	B5	SPI MOSI
SCS	B4	Chip Select (active high)
EXTCOMIN	B6	VCOM (refresh)
DISP	3.3	Display Enable (active high)
EXTMODE	3.3	On the breakout boards this is normally not connected to anything, and instead a jumper on the board should be set to 'H'

Example Software

Just use the [[MemoryLCD.js]] module as follows:

SPI1.setup({ sck:B3, mosi:B5, order: "lsb", baud: 4000000 });

var g = require("MemoryLCD").connect(SPI1, B4/*SCS*/, B6/*EXTCOMIN*/, 128/*width*/, 128/*height*/, function() {
  g.clear();
  g.drawString("Hello",0,0);
  g.drawLine(0,10,g.getWidth(),10);
  g.drawString(getTime(), 0, 20);
  g.flip();
});

More details on how to draw are in [[Graphics]].

Notes

• SPI must be set up with order : 'lsb' (the default is 'msb'), and the baud rate shouldn't be above 4000000
• Make sure you specify the correct width and height (either 96x96, 128x128, or 400x240 )
• Espruino toggles the VCOM pin (if specified) every 5 seconds. Sharp recommend 1 second but the longer time period allows Espruino to enter Deep Sleep and save a lot of power.

Buying

The LCDs come with a ~0.5mm ribbon on them so they're hard to connect to directly and you'll probably need a breakout board.

Sellers of LCDs on breakout boards are:

• MakerDyne 1.3" and 2.7"
• AdaFruit 1.3"