Ericsson Cell Phone Display GA628

Based on a WWW publication I [url=http://sandiding.tripod.com/ga628.html]found[/url], I designed a software written in standard C for the MSP430 family. It can easily be modified for different micros.

The GA628 display provides a 12 character alphanumeric display , some icons in the second line and power consumption of some 100 uA. It can easily be connected to the hardware, simply by soldering some wires. The only disadvantage is , it needs a 3.3V power supply and something around 5.6V. However, this code and the MSP430 provides a clock for a simple charge pump, realized with 3 diodes and 3 capacitors.

[b:9c07629195]Code[/b:9c07629195]
One may [url=http://www.circuitdb.com/download.php?fileID=169]download the driver for the display here[/url]. (3K zipped)

[b:9c07629195]Ericsson GA628 LCD display information[/b:9c07629195]
I2c device address: 0x74h, 0x75h
Lcd chip: PCF2103

[img:9c07629195]http://www.circuitdb.com/download.php?fileID=167[/img:9c07629195]
1 = Vlcd (+5.6V)
2 = Gnd
3 = Vlogic (+2.8V)
4 = Vlogic (POR)
5 = Sdata (i2c)
6 = Sclk (i2c)

[b:9c07629195]Charge pump schematic[/b:9c07629195]
[img:9c07629195]http://www.circuitdb.com/download.php?fileID=168[/img:9c07629195]

Copyright 2006 [url=http://www.qsl.net/dk7nt/index.html]Robert Tyrakowski[/url]

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