Phytec phyCORE-LPC2292/94, Hardware Manual

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phyCORE-LPC2292/94
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©
PHYTEC Messtechnik GmbH 2006 L-658e_5
8 On-Board Flash Memory (U300-U303)
Use of Flash as non-volatile memory on the
phyCORE-LPC2292/94 provides an easily reprogrammable means of
code storage. The following Flash devices can be used on the
phyCORE-LPC2292/94:
•
29LV800B with 1*16 kByte, 2*8 kByte, 1*32 kByte, 15*64 kByte
•
29LV160B with 1*16 kByte, 2*8 kByte, 1*32 kByte, 31*64 kByte
•
29LV320B with 8*8 kByte, 63*64 kByte
•
29DL800B with 4*8 kByte, 2*16Kbyte, 2*32 kByte, 14*64kByte
•
and all other pin- and function-compatible Flash devices available
on the market
These Flash devices are programmable with 3.3 V. No dedicated
programming voltage is required.
Use of a Flash device as the only code memory results in no or only a
limited usability of the Flash memory as non-volatile memory for
data. This is due to the internal structure of the Flash device as, during
the Flash-internal programming process, the reading of data from
Flash is not possible. Hence, for Flash programming, program exe-
cution must be transferred out of Flash (such as into von Neumann
RAM). This usually equals the interruption of a "normal" program
execution cycle.
If the phyCORE-LPC2292/94 is populated with multiple Flash
devices on the available Flash banks it is possible to store application
data in a Flash area which is physically seperated from the Flash area
that contains program code.
As of the printing of this manual, Flash devices generally have a life
expectancy of at least 100,000 erase/program cycles.