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HCS08 Fiches technique(PDF) 51 Page - Motorola, Inc

No de pièce HCS08
Description  Microcontrollers
PDF  290 Pages
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Fabricant  MOTOROLA [Motorola, Inc]
Site Internet  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

HCS08 Fiches technique(HTML) 51 Page - Motorola, Inc

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Data Sheet — MC9S08GB60/D V1.5
MOTOROLA
51
MC9S08GB/GT
A strictly monitored procedure must be followed or the command will not be accepted. This minimizes
the possibility of any unintended changes to the FLASH memory contents. The command complete flag
(FCCF) indicates when a command is complete. The command sequence must be completed by clearing
FCBEF to launch the command. Figure 4-2 below is a flowchart for executing all of the commands except
for burst programming. The FCDIV register must be initialized before using any FLASH commands. This
only must be done once following a reset.
Figure 4-2 FLASH Program and Erase Flowchart
START
WRITE TO FLASH
TO BUFFER ADDRESS AND DATA
WRITE COMMAND TO FCMD
NO
YES
FPVIO OR
WRITE 1 TO FCBEF
TO LAUNCH COMMAND
AND CLEAR FCBEF (2)
1
0
FCCF ?
ERROR EXIT
DONE
(2) Wait at least four bus cycles before
checking FCBEF or FCCF.
0
FACCERR ?
CLEAR ERROR
FACCERR ?
WRITE TO FCDIV(1)
(1) Only required once
after reset.



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