We've trying all day to interface the MC14489 7-segmented LED driver, but we cannot figure out how to drive it. We assume we need to control ik like this:
- set enable pin to low
- 1a)set clock to low
- 1b) make data pin high / low (for 1 / 0)
- 1c) make clock pin high
- Do 1 a-c for all data / bits.
- set enable pin to high.
This is the general way of shifting data (as we think we need to use).
Though we cannot drive the leds as the a-h pins stay low. Therefore
we think we aren't configuring the MC144 correctly. Can someone please
tell us how or describe how we need to configure or control this
Here is the datasheet:http://www.freescale.com/files/timing_interconnect_access/doc/inactive/MC14489B.pdf