PAK-II datasheet(13/28 Pages) ETC1

13 / 28 page

that the device is sending the response. The

READX and RIOA/B commands do not follow

this convention, but they take very little time to

execute anyway (less than 4uS).

To summarize, here are the ways you can

synchronize with the Pak II:

1. Delay long enough to insure the operation is

complete

2. Monitor the Enable/Busy line while Busy/Mode

is grounded. If you bring Enable/Busy low it

indicates that the Pak II is disabled. If the Pak II

brings the pin low, it means it is engaged in

operations.

3. Place a pull up resistor on the Busy/Mode pin.

This will cause the Busy/Mode pin to be high

when the Pak II is busy.

4. On commands that return status or ASCII digits,

you can wait until the data pin goes low.

Command Reference

ABS

Finds the absolute value of X. That is if X

is negative, negate it. If X is zero or

positive, leave it alone.

ADD

Adds X and Y leaving the result in X. Y is

unchanged. This command may take

PAK-II Datasheet(PDF) 13 Page - List of Unclassifed Manufacturers