Total Phase
Aardvark I
2
C/SPI Activity Board
External Monitor Connector (J5)
An external bus monitor or logic analyzer can be connected to these pins.
Each pin of the J5 connector is labeled with the signal name.
I
2
C Pins
SCL
Serial Clock line – the signal used to synchronize communication be-
tween the master and the slave.
SDA
Serial Data line – the signal used to transfer data between the transmitter
and the receiver.
SPI Pins
SS
Slave Select – control line that allows slaves to be turned on and off via
hardware control.
SCK
Serial Clock – control line that is driven by the master and regulates the
flow of the data bits.
MOSI
Master Out Slave In – this data line supplies output data from the master
which is shifted into the slave.
MISO
Master In Slave Out – this data line supplies the output data from the
slave to the input of the master.
Aardvark I
2
C/SPI Host Adapter connectors (Aardvark 1 & Aardvark 2)
Two connectors are provided for two Aardvark I
2
C/SPI Host Adapters.
These two connectors are always connected together pin-for-pin.
Powering the Activity Board
To power the Activity Board, the Aardvark adapter must be configured to
send target power to the board. This can be accomplished via the Roset-
ta Language Bindings or the Aardvark Control Center Software. When
powered-on, the board's POWER LED will be lit.
Cross Connecting Aardvark Adapters
When cross connecting two Aardvark adapters, the board must be pow-
ered on. Otherwise, results can be totally unexpected. If you experience
problems, please make sure that the Power LED on the board is lit.
Connecting Multiple Activity Boards
Multiple activity boards may be daisy-chained through these connectors
using a standard 10-pin ribbon cable. However, the user must ensure
that only one of the boards has its J4 (SS Connect) jumper connected to
prevent SPI EEPROM output signal contention.
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