Microsemi SmartFusion2 Quick Start Manual page 8

Using the MPM
The MPM Reference Design Demo
Without the MPM GUI
Once the MPM reference design has been programmed to the target hardware, the demo can be viewed even without
the MPM GUI by using SW3 on the Dev-Kit to initiate power-up and power-down sequences and observing the current
state of the MPM on the Dev-Kit LEDs.
The central button (SW3) is used to start the MPM sequencing. If the MPM system is off, pressing SW3 starts
sequencing the POLs up. If the MPM system is fully started, pressing SW3 starts sequencing the POLs down.
The remaining push buttons are connected to the MPM inputs and can be used to demonstrate the input functionality:
SW1 is connected to MPM input 1.
SW2 is connected to MPM input 2.
SW4 is connected to MPM input 3.
SW5 is connected to MPM input 4.
Figure 8 • SF2-Dev-Kit SW1 to SW5
The first four of the eight LEDs on the Dev-Kit are used to display the current state-of-the-MPM systems as follows:
LED 1 – ON when MPM is in the off state.
LED 2 – ON when MPM is sequencing power up.
LED 3 – ON when all POLs have sequenced on.
LED 4 – ON when MPM is sequencing power down.
LEDs 5 to 7 – are currently toggled by
mpm_threshold_task(), mpm_i2c_slave_task()
every time they run and provide a visual indication of
the MPM activity.
LED 8 – pulses once if there is a PMBus l
and twice if there is a PMBus error, which provides a
useful oscilloscope or logic analyzer trigger signal
when debugging issues on the PMBus.
Figure 9 • SF2-Dev-Kit LEDs
8
2
C timeout