User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 108
www.energymicro.com
Figure 10.2. EMU Energy Mode Transitions
EM0
EM1
EM2
Software triggered sleep
Interrupt triggered wakeup
Reduced energy consumption
EM3
Low energy
modes
Active
mode
EM4
pin reset,
power-on reset,
EM4 wakeup,
BURTC interrupt
No direct transitions between EM1, EM2 or EM3 are available, as can also be seen from Figure 10.2 (p.
108) . Instead, a wakeup will transition back to EM0, in which software can enter any other low energy
mode. An overview of the supported energy modes and the functionality available in each mode is shown
in Table 10.1 (p. 109) . Most peripheral functionality indicated as On in a particular energy mode can
also be turned off from software in order to save further energy.