Homework # 9  Due Monday March 16th prior to the start of class


Using your newfound knowledge of the pulse accumulator subsystem 
and of the on chip EEPROM.  Design the following:


You are to write a "second meter" for a piece of equipment.  You are
to use the PAI subsystem to detect when the key is "on" (which you 
should assume will show up as a "0" on pin PA7).  A count should 
be incremented for each second that the device is on, and the count
is to be stored in EEPROM in order to be preserved if the batteries 
are removed.  You should store it at (EEPROM) address $B7DD.

You may treat fractions of seconds in any way you desire.  That is if the 
key is on for 7.6 seconds, you can treat that at 7, or as 8, or as 7.6000.   
You should explain  how you're handling this, and why of course.

Email your solution to ee347Lsdsu@gmail.com using our your initials as
part of the filename. (e.g. mine would be rsfhw09.asm) prior to class 
time on Monday.  Also bring a hardcopy to class, as we will discus this in 
class on Monday.