[Cryptech Tech] Physical and electrical spec for avalanche noise source - TerasIC C5G

[Joachim Strömbergson]

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Aloha!

First, thank you Benedict (and Bernd) for taking the time to come to the
Cryptech meeting. It really helped us to move the RNG design forward.

As promised here is info, requirements for connecting your entropy
source to the TerasIC C5G board. For reference, see the PDF at:

http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=165&No=830&PartNo=4

As I see it, there are two main ways to do this.

(1) Using pins in the 40 pin expansion header. 	(see chapter 3.11, page
49). This header provides +5V, +3.3V and GND. The I/Os on the header
operateds at 3.3V and each I/O is equipped with protection diodes.

The simplest might be to just use a four pin (female) connector that
connects either directly on top of pins 9..11 (for I/O and 5V) or over
pins 24..27 (for I/O and 3.3V). Or a small daughter board with similar
footer.

(2) Using an Arduino Shield breadboard such as this:
http://www.adafruit.com/products/51

The C5G board provides matching headers similar to an Arduino Uno. Just
use one of the digital I/O pins and Table 3-21 and power, gnd as
specified for the Shield and it should all be possible to use with
either the C5G board or an Arduino.

Is 5V power and 3.3V I/O any problem for you?

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
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 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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