{{ :electronic:lcd:p1296848a.jpg?200|NG-87243-001}} ^ LCD Description || ^Model|**NG-87243-001**| ^Manufacturer|Samsung?| ^Recovered from|[[:electronic:equipment:phone:dtr16d|Nec DTR-16D-1A]]| ^Board IDs|NG-87243-001, NG-84458-001| ^Alt. board IDs|A50-002005-003, MBCF24302Z04. A50-002005-002, MBC24302Z02 ((in a DTR-8D-1A))| ^LCD type|positive| ^Polarizer type|reflective| ^Columns|24| ^Rows|3| ^Char matrix|5x7| ^Driver IC|Hitachi HD44780 compatible (covered in epoxy)| ^Backlight|-| ^Arduino driver|LiquidCrystal_24x3.h((this is a standard HD44780 library, but the row start addresses are 0x00,0x20,0x40,0x60))| ^Connector|PCB flex cable| ^Num Pins|16| ^Pin spacing|0.05"| ^Module size|98 x 37 mm| ^ ^ Measured ^^^^ Connector pin-out ^^ Arduino test rig || ^Pin#^Main board^LCD board^LCD on^LCD off^IC pin^Label^Pin^colour| ^1| |Green LED K|1.7V|0.0V| ^2| |LED A common|0.8V|0.0V| ^3| |Red LED K|1.9V|0.0V| ^4| | |2.9V|0.1V| |RS| ^5| | |0.4V|0.1V| |E| ^6| |164k|0.7V|0.1V| |D0| ^7| |1.4M|0.6V|0.2V| |D1| ^8| | |0.6V|3.3V| |D2| ^9| | |0.3V|3.3V| |D3| ^10|3.45k|120k|3.3V|3.3V| |Vcc| ^11|GND|GND|0.0V|0.0V| |GND| ^12| |100k|1.9V|1.7V| |Contrast| ^13|NC|120k|3.3V|3.3V| | | ^14|NC| |0.0V|0.0V| ^15|GND|GND|0.0V|0.0V| |((hard wired on LCD board to GND, perhaps just indicates LCD module is present))| ^16|NC| |0.0V|0.0V| The connector pins aren't labeled on the LCD module, I have used the numbering on the phone board. This corresponds to viewing the LCD module from the back, with the flex connector at the top and numbering the pins 1 to 16 from left to right. In the phones it seems to operate with a contrast voltage of 1.9V, but I had to supply 2.3V on my test rig, might be because supply voltage was only 3V rather than 3.3V. The LCD modules can be swapped out from the phones quite simply, and are interchangeable between the DTR-16D and DTR-8D, DTH series and possibly other models. See https://www.commgear.com/Documents/LCD%20Replacement-Instructions.pdf. The LCD uses an adapter to plug into a socket within the phone, the socket on the phone board can be de-soldered and used as an easier way to connect to the LCD than trying to connect to the LCD's flex cable. The module consists of two parts folded together: a PCB with the controller electronics, connected via a wide PCB flex cable to the LCD glass. \\ The slightly modified LCD library ((this is a standard HD44780 library, but the row start addresses are 0x00,0x20,0x40,0x60)):\\ * {{:arduino:dtr16d:liquidcrystal_24x3.h}}, SPI LCD library * {{:arduino:dtr16d:liquidcrystal_24x3.cpp}}, SPI LCD library ===== Datasheets ===== * {{:electronic:lcd:nec_ng-8743-lcd.pdf|LCD initialisation sequence from sigrok analysis}} * {{:electronic:lcd:nec_ng-8743-startup.sr|LCD initialisation sequence in sigrok format}}((this file has an extra data glitch in it that fools sigrok into getting the nibbles aligned so the 2 nibble codes are easier to decode with the 'parallel' filter)) ---- ===== Examples : ===== |{{:electronic:lcd:p1296847a.jpg?800|NG87243 front}}| |{{:electronic:lcd:p1296843a.jpg?800|NG87243 back}}| |{{:electronic:lcd:p2044565a.jpg?800|MBCF24302Z04 back}}| |{{electronic:lcd:p2044567a.jpg?800|MBCF24302Z04, unfolded, inside}}| |{{:electronic:lcd:p1296839a.jpg?800|NG87243 overview, mounted, front}}| |{{:electronic:lcd:p1296835a.jpg?800|NG87243 overview, mounted, back}}| |{{:electronic:lcd:p1296842a.jpg?800|NG87243 overview, mounted, interior}}| |{{:electronic:lcd:p2104631a.jpg?200|NG87243 connector top}}|{{:electronic:lcd:p2104636a.jpg?200|NG87243 connector bottom}}| |{{:electronic:lcd:p2104627a.jpg?200|NG87243 adapter cable end}}|{{:electronic:lcd:p2104628a.jpg?200|NG87243 adapter PCB end}}| |{{:electronic:lcd:p2104626a.jpg?200|NG87243 adapter top}}|{{:electronic:lcd:p2104624a.jpg?200|NG87243 adapter bottom}}| |{{:electronic:lcd:p2104618a.jpg?200|NG87243 cable top}}|{{:electronic:lcd:p2104621a.jpg?200|NG87243 cable bottom}}| |{{:electronic:lcd:.jpg?300|NG87243 chip}} |{{:electronic:lcd:p2166960a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166961a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166955a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166956a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166957a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166958a.jpg?300|NG87243 character set}}| |{{:electronic:lcd:p2166959a.jpg?300|NG87243 character set}}| {{:electronic:lcd:p1306904a.jpg?400|NG87243 examples, 'self test'}} {{:electronic:lcd:p1306908a.jpg?200|NG87243 pixel layout}} |{{:electronic:lcd:.jpg?800|NG87243 circuit}}