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M32C/86 Fiches technique(PDF) 433 Page - Renesas Technology Corp

No de pièce M32C/86
Description  RENESAS 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES
PDF  505 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M32C/86 Fiches technique(HTML) 433 Page - Renesas Technology Corp

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25.3.5.7 Lock Bit Program Command
The lock bit program command sets the lock bit for a specified block to "0" (locked).
By writing command code "xx7716" in the first bus cycle and "xxD016" to the highest-order even ad-
dress of a block in the second bus cycle, the lock bit for the specified block is set to "0". The address
value specified in the first bus cycle must be the same highest-order even address of a block specified
in the second bus cycle.
Figure 25.11 shows a flow chart of the lock bit program command programming. Execute read lock bit
status command to read lock bit state (lock bit data).
The FMR00 bit in the FMR0 register indicates whether a lock bit program operation is completed.
Refer to 25.3.6 Data Protect Function for details on lock bit functions and how to set it to "1" (un-
locked).
Start
Lock bit program operation
is completed
YES
NO
Write the command code "xx7716" to
the highest-order block address
FMR00=1?
Full status check
Write "xxD016" to the highest-order
block address
NOTES:
1. Write the command code and data to even addresses.
Figure 25.11 Lock Bit Program Command



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