Raisonance REva v3 User Manual - page 9
REva v3 User Guide
3. REva motherboard
3.2 Daughter board connection
The REva motherboard must be used with either a daughter board or an
external target board. This area can connect to a daughter board featuring a
target microcontroller for evaluation. This area may also be used to connect the
REva to another board with the appropriate connectors soldered to the bottom.
3.2.1 Features
The features of this area are:
●
A standard SO-DIMM connector to receive the daughter board. The
procedure of insertion/extraction is described in chapter 3.2 Daughter
Boards.
●
A 72-position header for observation and measuring of useful signals.
●
Two 40-position headers to which the other 72 positions of the SO-DIMM
are connected, as well as some VDD and GND positions. This is useful for
obtaining multiple power supply signals when connecting the REva to
another board.
3.2.2 Limitations
The SO-DIMM connector is guaranteed for 20 insertion-extraction cycles (more
in practice...).
3.3 ISP/ISD connection area
This area allows the connection of an external RLink (Rlink-PRO). When doing
this, make sure the USB of the embedded RLink is disconnected. You must
then plug the jumpers of the RLink config and power sections of the REva board
as if you were using the embedded RLink.
The 24-pin connector can also be used to make the embedded RLink able to
drive an external target board. For that you will have to use an adapter
depending on the target protocol. You can use adapters from stand-alone
RLinks, or make your own using the information here:
http://raisonance-forum.xsalto.com/viewtopic.php?id=2449
3.4 Reset area
This area resets the devices on the daughter board.
3.4.1 Features
The features of this area are:
●
1 push-button with a negative polarity.
●
1 RC debouncing filter with a time constant of 330 us (soldered on the
bottom side of the board).
3.4.2 Limitations
Microcontrollers using a positive reset signal require an inverter embedded on
the daughter board.
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