Developing E-field touch panel to simulate window mouse

[quicksights]

Hello guys,

    Im helping out my sister's group develop a touch panel similar to "SMART BOARD"

and simulate window cursor functions

   Initial prototype ill develop a small one the size of a serving tray, but will develop it

to about 3ftx4ft

   There are several schematics but this is my reference the grid design by mr bruce pride

2 e-field chips(X and Y)

   http://www.jandspromotions.com/efield2003/entry_abstracts/EF3387abstract.pdf

   however i couldnt find any solid datasheet pertaining to the microcontroller used

   MC68HC908QY4T, maybe this is obsolete

   so we were referred to MC68HC908QB8, which has lots of reference . at first

 I thought ABCD pins of e-field are analog pins. creating lots of problems because

 weve already requested for the samples and i ran out of A/D pins in my initial design

 good thing i was wrong

 First stage of development I think i can handle it. But if i enlarge the panel board to

 3ftx4ft. i have no idea what's the best method to approach this. If you guys have

 some suggestions ill gladly appreciate it.

thank you,

mark

[Alban]

Euh Mark,

Each product has a page with its datasheet...

Data Sheets

ID and Description	Vendor ID	Format	Size K	Rev #	Date Last Modified
MC68HC908QY4 MC68HC908QY4, MC68HC908QT4, MC68HC908QY2, MC68HC908QT2, MC68HC908QY1, MC68HC908QT1 Data Sheet	FREESCALE	pdf	1763	5.0	7/07/2004

Alban

[quicksights]

oops, missed that one

i was looking for QY4T

seems there is none

probably T means

 TSSOP package

thanks anyway