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5. Storage
FIGnition includes 0.4Mb (or 0.9Mb) of serial Flash storage for saving programs and data
when FIGnition is turned off. The chip must operate at no more than 3.6V and therefore we
need to convert between the AVR's 5v signals and the Flash chip. Flash storage can't be
freely modified so FIGnition contains firmware which enables it to be used as a true solid-
state disk.
5.1 Circuit Diagram
Fig 5.1
5.2 Hardware Operation
5.2.1. Electrical Connections
The Amic serial Flash requires a 3.6v power supply, this is described in
Chapter
10.
Its data signals require 3 input connections that convert 5v signals to about 3.6v and one
output connection that converts from 3.6v to closer to 5v. These are just simple potential
dividers as described in
Appendix A
[Fig 5.2].
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