Microchip Technology PRO MATE II, Руководство пользователя

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1999 Microchip Technology Inc. DS30243H-page 23
Chapter 3. Programming K
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Devices
3.5.3 Changing the Manufacturer’s Code
It is possible that a manufacturer would like to have different manufacturer’s
codes for different product lines. It is not possible to change the
manufacturer’s code during a programming session. This prevents the
manufacturer’s code being inadvertently changed during a programming
session.
To change the manufacturer’s code, exit PRO MATE II and enter the new
manufacturer’s code when the program is restarted.
3.5.4 Key Generation Source and Algorithms
The key generation source and algorithms are selected when the user selects
a decoder. The source and algorithm selected for each decoder is given in
Table 3.5.
Table: 3.5 K
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Decoder Key Generation Methods
Decoder Source Algorithm
Serial
Number
Seed Decryption Algorithm
SIMDEC* No key generation. The simple decoder uses the
manufacturer’s code
MCDEC* X X
MCSLRN* X X X
HCS512 X X X X
*The MCDEC, MCSLRN and SIMDEC decoders are software decoders.
These decoders have been written as a “quick start” to a customer who
would like to write a custom decoder. The source code for the decoders and
application note describing each of the decoders is available by ordering
DS40149 from your local Microchip representative.