Phytec phyCORE-167CR, Hardware Manual

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phyCORE-167CR/167CS
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PHYTEC Meßtechnik GmbH 2002 L-527e_8
10 Flash Memory (U1)
Use of Flash as non-volatile memory on the phyCORE-167CR/167CS
provides an easily reprogrammable means of code storage. The
following Flash devices can populate the phyCORE-167CR/167CS:
•
29F200 with 1* 16 kByte, 2* 8 kByte, 1* 32 kByte, 3* 64 kByte
•
29F400 with 1* 16 kByte, 2* 8 kByte, 1* 32 kByte, 7* 64 kByte
•
29F800 with 1* 16 kByte, 2* 8 kByte, 1* 32 kByte, 15* 64 kByte
•
29F160 with 1* 16 kByte, 2* 8 kByte, 1* 32 kByte, 31* 64 kByte
These Flash devices are programmable with 5 V. No dedicated pro-
gramming 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
execution must be transferred out of Flash (such as into von Neumann
RAM). This usually equals the interruption of a "normal" program
execution cycle.
As of the printing of this manual, Flash devices generally have a life
expectancy of at least 100.000 erase/program cycles.