µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.




Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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Nokia 1100 LCD Pic interface

Nokia 1100 display working with a PIC writen in Microchip C.

The controller is PCF8814 its is 'not' I2C. The chip is I2C capable but this LCD does not use that mode. the VDDI input can be used if the I/O levels are different than the LCD supply voltage. as per 1100's service manual, VDDI id 1.8v but the LCD supply voltage is 2.8v. in our case both the voltages are the same. The Led driver as per the manual runs with a 4.7ohm resistor at 3.6v.

Link: Nokia 1100 LCD Pic interface

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