1.
NBN Project Series
Synchronising Data

2. Clock Pulse Definitions
Positive Pulse
Leading
Edge
Trailing
Edge

3. Clock Pulse Definitions
Positive Pulse
Negative Pulse
Leading
Edge
Trailing
Edge
Leading
Edge
Trailing
Edge

4. Clock Pulse Synchronisation
Data read on leading edge of clock pulse.
Signal would be read as “ON” or “1”.
Data read on leading edge of clock pulse.
Signal would be read as “OFF” or “0”.
Data read on leading edge of clock pulse.
How would this signal be read?
Data
Clock Pulse

5. Clock Pulse Synchronisation

6. Clock Pulse Synchronisation1 ? 1 ? 1 1
Is that the signal you thought would be sent / received?

7. Clock Pulse Synchronisation
In Synchronous circuits each storage element (data) must be loaded before the clock pulse is sent to transmit the data.
Circuits:
Data is sent to a register where it is held. The data is transmitted on either the leading or trailing edge of the clock pulse.
Simple registers consist of a bank of ‘Flip Flops’.

8. Clock Pulse Synchronisation
In Synchronous circuits each storage element (data) must be loaded before the clock pulse is sent to transmit the data.
Programming Considerations
When writing your program for the TI-Innovator, make sure the data is sent to the LED that will be used to display the data BEFORE sending the ON signal to the LED representing the clock pulse.