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electronic:lcd:metp0000 [2018/10/10 09:21] – tonyelectronic:lcd:metp0000 [2026/09/26 05:12] (current) – tony
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-{{ :electronic:lcd:pa101844a.jpg?200|METP0000}} +{{ :electronic:lcd::pa101833a.jpg?200|METP0000}} 
-^<html><p style="text-align:center">LCD Description</p></html>||+^  LCD Description  ||
 ^Model|**METP0000**| ^Model|**METP0000**|
 ^Manufacturer|Mettler  Toledo| ^Manufacturer|Mettler  Toledo|
-^Recovered from|Mettler  Toledo  Model  8217 scale | +^Recovered from|Mettler  Toledo  Model  8217 weigh scale| 
-^LCD type|| +^Board IDs|OPCVO, METP0000 REV B| 
-^Polarizer type|| +^LCD type|positive| 
-^Columns|6|+^Polarizer type|reflective| 
 +^Columns|6 ((a 7th, undisplayed, digit is used to control some of the under-bar elements))|
 ^Rows|1| ^Rows|1|
-^Char matrix|7 segment with underscore, decimal point and comma| +^Char matrix|7 segment with decimal point and comma, plus 5 under-bar elements| 
-^Driver IC|NEC μPD7225 (({{:electronic:datasheet:nec:upd7225.pdf}})) (({{electronic:datasheet:nec:upd7225_ap_note.pdf}}))|+^Driver IC|NEC D7225GB (μPD7225)  (({{:electronic:datasheet:nec:upd7225.pdf}})) (({{electronic:datasheet:nec:upd7225_ap_note.pdf}})) (({{https://ia801305.us.archive.org/4/items/bitsavers_necdatabooMicrocontrollerDataBook_57118308/1990_NEC_Single-Chip_Microcontroller_Data_Book.pdf|NEC 1990 Microcontroller Databook, page #826}}))|
 ^Backlight|-| ^Backlight|-|
-^Arduino driver||+^Arduino driver|[[:arduino:metp0000_driver_library|METP0000 driver library]]|
 ^Connector|RJ45| ^Connector|RJ45|
 ^Num Pins|8| ^Num Pins|8|
-^Pin spacing|"|+^Pin spacing| |
  
-^ ^^^^Arduino test rig ((reminder for my personal testing, not useful for anyone else!))||+^  Connector pin-out  ^^^^  Arduino test rig ((colour coding of wires in a re-purposed ethernet cable))  ||
 ^Pin#^Label^IC pin^Label^Pin^colour| ^Pin#^Label^IC pin^Label^Pin^colour|
-^1|Busy| |~Busy|-|white/orange| +^1|Busy| |~Busy|D10 ((optional when using Arduino driver library))|white/orange| 
-^2|Reset| |~Reset|D7|orange|+^2|Reset| |~Reset|D7 ((not needed by Arduino driver library))|orange|
 ^3|Si| |Si|D5|white/green| ^3|Si| |Si|D5|white/green|
 ^4|SClk| |~SCK|D4|blue| ^4|SClk| |~SCK|D4|blue|
 ^5|CS| |~CS|D8|white/blue| ^5|CS| |~CS|D8|white/blue|
-^6|~C/D| |C/~D|D6|green|+^6|~C/D| |C/~D|D6 ((not needed by Arduino driver library))|green|
 ^7|GND|20|Vss|GND|white/brown| ^7|GND|20|Vss|GND|white/brown|
 ^8|+5V|21|Vdd|+5V|brown| ^8|+5V|21|Vdd|+5V|brown|
-\\ 
 \\ \\
  
-Appears to be wired for 1/3 bias, divide by 3 or 4 time division.  Comma and underscore may be implemented as segments of extra characters (ie 7th and 8th digits??).  Data and control lines are buffered by inverting schmitt triggers (74hc14) +\\
-.  Front keypad switches appear to be encoded by a 74HC165 shift register and wire-ORed to the pin 1 output line.+
 ---- ----
-===== Examples : ===== +===== Examples =====
- +
-{{:electronic:lcd:pa101844a.jpg?800|METP0000}}+
  
 {{:electronic:lcd:pa101833a.jpg?800|METP0000}} {{:electronic:lcd:pa101833a.jpg?800|METP0000}}
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 {{:electronic:lcd:pa101840a.jpg?300|METP0000}} {{:electronic:lcd:pa101840a.jpg?300|METP0000}}
  
 +{{:electronic:lcd:pb222808a.jpg?800|METP0000}}
 +
 +{{:electronic:lcd:pb222808b.jpg?200|METP0000}}

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electronic/lcd/metp0000.1539163264.txt.gz · Last modified: 2018/10/10 09:21 by tony
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