Hi List ...

I am using a 16f873 controlling 3 DC motors (fwd/rev) and 2 steppers for
the pan / tilt axis of a camera.

I wish to implement a simple return to centre facility for the camera which
means saving the direction travelled and how far from the centre for each
axis.

My question is this - would these four registers best be saved in the Pic
internal eeprom or a small external I2C device.

I intend to save the registers on the completion of each move or when the
camera has reached one of the software limits set.

I have no way of knowing how far and how often the camera will be moved
as the camera is for a cctv surveillance type setup. Time is not critical
so a serial device is acceptable.

Finally, do the write/erase cycles for memory normally apply to the complete
chip or individual locations ??

Thanx


Steve




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