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FTS64K Fiches technique(PDF) 21 Page - Freescale Semiconductor, Inc

No de pièce FTS64K
Description  64k bytes of Flash memory
PDF  44 Pages
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

FTS64K Fiches technique(HTML) 21 Page - Freescale Semiconductor, Inc

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FTS64K Block User Guide — Version V01.00
21
The FSEC register is loaded from the Flash Protection/Options field byte at $FF0F during the reset
sequence, indicated by “F” in Figure 3-3.
KEYEN — Enable backdoor key to security.
1 = backdoor to Flash is enabled.
0 = backdoor to Flash is disabled.
NV[6:2] — Non Volatile Flag Bits.
These 5 bits are available to the user as non-volatile flags.
SEC[1:0] — Memory Security Bits.
The SEC[1:0] bits define the security state of the device as shown in Table 3-4. If the Flash is
unsecured using the Backdoor Key Access, the SEC bits are forced to 10.
The security function in the Flash module is described in section 4.5.
3.3.3 RESERVED1
This register is reserved and is not accessible to the user.
Register address BASE + $102
Figure 3-4 RESERVED 1
Table 3-4 Security States
SEC[1:0]
Description
00
secured
01
secured
10
unsecured
11
secured
76543210
R
00000000
W
Reset:
00000000
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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