31
31
mosaic Integration
31
•
Many pins are reserved, which means that their functionality is proprietary or is
not supported yet by the firmware. Reserved pins are marked
“Reserved_NC” and
“Reserved_GND”. The Reserved_NC pins must be left unconnected. The
Reserved_GND pin (i.e. only AB7) must be tied to ground.
5.3
Decoupling
The VDD_3V3 supply shall be decoupled with at least a 22 µF capacitor with proper voltage
rating. T
he other supply terminals don’t need external decoupling.
5.4
Power States
The module can be in three different states: off, active or standby.
When off, the module is completely turned off. In active state, it is operating with all
functions active. Standby state is similar to off, the main difference being in the transition
from the active state:
•
When going from active to off, recent data logged to an external SD card may be
lost (see section 4.6).
•
When going from active to standby, all logging tasks are terminated and the SD
card is cleanly unmounted.
The standby state is optional and only available if the host design supports it. See section
4.12 for details.
