Interfacing ARM to LCD

[jobla]

lm64p70 datasheet

Hello,

i've here a little old ARM7-Board from Sharp, the AEB-1 with the ARM7TDI- Processor LH77790 and an LM64P70 - 640x480-monochrom-LCD, from Sharp too.
The LH77790 has an integrated LCD-Driver with the Pins VD0...7, CP1, CP2, S and MCLK.
The LM64P70 has 14 Pins:
1 S
2 CP1
3 CP2
4 Vdd
5 Vss
6 Vee
7...10 DU0...DU3 Display Data upper half
11...14 DL0...DL3 Display Data lower half

...plus a white and a pink cable (the datasheet mentions CCFT-GND and CCFT-HV,
ground and high voltage from inverter).

It would be nice if this two devices could be connected. Has anyone experience
with this? Good And bad experiences are welcome!
If anyone knows a good information-source (book!?) about LCD-principles (what role plays the inverter and how to build one??), i also would be very thankful.

Greets,

J. B.

Added after 4 hours 27 minutes:

ok, i found a good explanation of dc/ac-inverters at tdk:

**broken link removed**

but now... which inverter to choose?

The datasheet of the lcd says about the inverter-parameters:

circuit voltage 1100 Vrms min 1500 Vrms max
serial res - -
discharge curr. 3.5 to 7 mA ac
power consum. 2W
discharge tube voltage 280Vrms

What is meant with the circuit voltage? Is this the "startup-voltage" to get
the tube discharging?

jb

 

[jhallows]

lcd interfacing to arm circuit

I have the same problem, (no inverter).

Anyhow check out the following links to build your own:

Appnote 55

**broken link removed**

I believe any inverter that produces a sine wave between 1100Vrms and 1500Vrms at 3.5 - 5mAac should work. The refernce design in these Application notes should be a good starting point. The application note that you posted just states you should use a royer design but dosen't give you any method of calculating the requirements.