First of all, I'd like to say : MERRY Christmas & Happy new Year
I have 2 LCDs, I got them from broken telephone sets. I can't understand what are the function of each pin. I couldn't find any datasheet for them.
The 2 LCDs are different.
They seem to be specifically build for telephone sets. HK or HKS may refer to the hook switch. Others signals as SDI and ClK suggest a serial interface. And 12/24 the time format for the clock display.
It is strange that in the 2nd photo there is no VSS connected.
I would try to follow the connections of the LCDs to the phone sets. If you have an oscilloscope you can check what is going on on the serial data lines. If a scope is not available you can use a simple logic analyzer that uses the parallel port of a pc.
Thanks for your replies, but what about the other pins.???
Could anyone tell me, How to do the following:
" I want to activate the lcd and send any digit to it using a microcontroller. I think SD1 or D1 are for the data."
Thanks for all your help,.. But, as I told you before that there's nothing written except that in the pictures.
Could anyone guide me to a reference, where I can find info about these terminals.???
Check if inside broken telephone sets you got one stamped HT93 followed by two or three digits (the dialer part of telephone). If yes you probably have one of Holtek HT1613 or HT1616 depends of the number of LCD digits (8, 10, 12, 16)
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