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--- electronic:lcd:f4528 [2018/12/08 22:39] – created tony
+++ electronic:lcd:f4528 [2026/09/26 08:10] (current) – tony
@@ Line 1: / Line 1: @@
-{{ :electronic:lcd:.jpg?200|F-4528}}
+{{ :electronic:lcd:pc093040a.jpg?200|F-4528}}
-^<html><p style="text-align:center">LCD Description</p></html>||
+^  LCD Description  ||
 ^Model|**F-4528**|
 ^Manufacturer||
-^Recovered from|Digitor F-4528 phone|
+^Recovered from|[[:electronic:equipment:phone:f4528|Digitor F-4528 phone]]  ((appears to be the same as Audioline TEL38 clip))|
-^LCD type||
+^Board IDs|EPBD25FR REV2|
-^Polarizer type||
+^LCD type|positive|
-^Columns||
+^Polarizer type|reflective|
-^Rows||
+^Columns|16|
-^Char matrix||
+^Rows|3 ((1 row symbols and digits, 1 row 7-segment digits, 1 row 5x5 alphanumeric))|
-^Driver IC||
+^Char matrix|7-segment, 5x5|
+^Driver IC| |
 ^Backlight|-|
 ^Arduino driver||
@@ Line 16: / Line 17: @@
 ^Pin spacing|"|
-^ ^^^Arduino test rig ((reminder for my personal testing, not useful for anyone else!))||
+CON1
+^  Connector pin-out  ^^^  Arduino test rig  ||
 ^Pin#^IC pin^Label^Pin^colour|
-^1|
+^1| | |lo|-|
-^2|
+^2|lcd| |lo|-|
-^3|
+^3|lcd| |hi|-|
-^4|
+^4| | | |885ohm|
-^5|
+^5| | |lo|-|
-^6|
+^6| |GND|lo|0ohm|
-^7|
+^7|lcd|Vcc?|hi|-|
-^8|
+^8| |1.7mS wave| |360ohm|
-^9|
+^9| |1.7mS wave| |370ohm|
-^10|
+^10|lcd| |hi|-|
-^11|
+^11|lcd| |hi|-|
-^12|
+^12|lcd|reset?|hi|-|
-^13|
-^14|
+CON2
-^15|
+^  Connector pin-out  ^^^  Arduino test rig  ||
-^16|
+^Pin#^IC pin^Label^Pin^colour|
-^17|
+^1| |Vcc|hi|1.3k|
-^18|
+^2|lcd| |hi|515ohm|
-^19|
+^3| |sclk 1.4kHz|lo|100ohm|
-^20|
+^4| |sda|hi|100ohm|
-\\
+^5|lcd| |lo|540ohm|
+^6| | |lo|310ohm|
+^7| | |hi|-|
+^8|lcd| |lo|847ohm|
+^9| | |lo|-|
+^10| | |hi|490ohm|
+^11| | |lo|-|
+Has an LCD controller underneath the LCD on the top of the board.  I'm not sure whether this includes other logic too, the LCD board is connector to the keyswitches, so it must be used for at least that function too.  There may not be a way to access the LCD logic by external controllers.
 \\
+===== Datasheets =====
+  * {{:electronic:datasheet:promax-johnton:pj31002.pdf|Promax-Johnton PJ31002}} Tone ringer for telephone set.
+  * {{:electronic:datasheet:unisonic:mc34018.pdf|Unisonic MC34018}} Voice switched speaker phone circuit.
+\\
 ----
-===== Examples : =====
+===== Examples =====
+{{:electronic:lcd:pc093040a.jpg?800|F-4528 front}}
+{{:electronic:lcd:pc083037a.jpg?800|F-4528 back}}
+{{:electronic:lcd:pc093049a.jpg?300|F-4528 character set}}\\
+{{:electronic:lcd:pc093053a.jpg?300|F-4528 character set}}\\
+{{:electronic:lcd:pc093055a.jpg?300|F-4528 character set}}\\
+{{:electronic:lcd:pc093058a.jpg?300|F-4528 character set}}\\
+{{:electronic:lcd:pc093061a.jpg?300|F-4528 character set}}\\
-{{:electronic:lcd:.jpg?800|F4528}}
+{{:electronic:lcd:pc093048a.jpg?400|F-4528 examples}}
+{{:electronic:lcd:pc083028a.jpg?400|F-4528 examples}}

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