{{ :electronic:lcd:p4118674a.jpg?200|CANON MX300}} ^ LCD Description || ^Model|**CANON MX300**/MX310| ^Manufacturer|Canon| ^Recovered from|Canon MX300 printer| ^Board IDs|QM3-2759| ^LCD type|positive| ^Polarizer type|reflective| ^Columns|20| ^Rows|2| ^Char matrix|5x8 ((the MX300 displays a mix of single and double height (5x16) digits, but it may be using the programmable character set)) | ^Driver IC|Hitachi HD44780 compatible ((Don't know chip id, but it has non standard commands: 0x39 mirror vertically, 0x3a mirror horizontally, 0x3b rotate 180° (mirror horz & vert) )) (CoG)| ^Backlight|-| ^Arduino driver|LiquidCrystal.h, or [[:arduino:mx300_driver_library]]| ^Connector|PCB flex cable| ^Num Pins|14| ^Pin spacing|0.04"| The two rows of 20 characters have no space row between them, so that using the 8 programmable characters you can create characters that span both rows. The Canon MX300 printer displays a mix of single and double height digits, but I have no information on whether the controller supports this or whether they just used programmable characters. During testing I tried setting double height fonts but to no useful effect. See [[:arduino:mx300_driver_library]] for drivers that implement double height characters. ^ Connector pin-out ||^ Arduino test rig | ^Pin#^Label^Description ^Pin| ^1|R/W|0V| ^2|RS|0V| ^3|E|0V| ^4|DB0|3.26V| ^5|DB1|3.26V| ^6|DB2|3.26V| ^7|DB3|3.26V| ^8|DB4|3.26V| ^9|DB5|3.26V| ^10|DB6|3.26V| ^11|DB7|3.26V| ^12|Gnd|0V| ^13|Vdd|3.27V| ^14|Vlcd|4.66V| Pin assignments verified 25/12/18. \\ \\ Has the same interface, drivers and character set as [[:electronic:lcd:canonmp220|Canon MP220 LCD]]. ---- ===== Examples : ===== {{:electronic:lcd:p4118674a.jpg?800|CANON MX300 front}} {{:electronic:lcd:p4118681.jpg?300|CANON MX300 connector}} {{:electronic:lcd:p4118682.jpg?300|CANON MX300 connector}} {{:electronic:lcd:pa252257a.jpg?300|CANON MX300 connector}} {{:electronic:lcd:p4118680.jpg?300|CANON MX300 chip}} {{:electronic:lcd:pc263411a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263398a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263399a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263400a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263401a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263402a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pc263403a.jpg?300|CANON MX300 character set}}\\ {{:electronic:lcd:pa252244a.jpg?400|CANON MX300 examples}} {{:electronic:lcd:pa252251a.jpg?200|CANON MX300 examples}}\\ Example of double height numeric characters displayed by the MX300. {{:electronic:lcd:pc263404a.jpg?400|CANON MX300 examples}}\\ {{:electronic:lcd:pc283419a.jpg?400|CANON MX300 examples}}\\ Double height digit example using {{:electronic:lcd:mx300_dh_digits1.pdf|eight custom characters}}. {{:electronic:lcd:p1063644a.jpg?400|CANON MX300 examples}}\\ Double height digit example using {{:electronic:lcd:digits_bignum.pdf|seven custom characters}}. {{:electronic:lcd:p1063642a.jpg?400|CANON MX300 examples}}\\ Double height digit example using {{:electronic:lcd:mx300_dh_digits-b.pdf|six custom and four existing characters}}. {{:electronic:lcd:pc283415a.jpg?400|CANON MX300 examples}}\\ {{:electronic:lcd:pc283417a.jpg?400|CANON MX300 examples}} (({{:electronic:lcd:mx300_clock.ino}}))\\ Double height digit examples using a {{:electronic:lcd:mx300_dh_digits2.pdf|seven custom and three existing characters}}. {{:electronic:lcd:pc283431a.jpg?400|CANON MX300 examples}} (({{electronic:lcd:mx300_clock2.ino}}))\\ Double height digit example using a {{:electronic:lcd:mx300_dh_digits3.pdf|dynamic custom character set}}. {{:electronic:lcd:pc263406a.jpg?150|CANON MX300 pixel layout}}\\ Example of two characters with all bits lit showing how they form one continuous block.