Kinetis MicrocontrollersのトピックRe: Flash security Byte

Flash security Byte

Schani — Wed, 22 Feb 2012 11:44:32 GMT

Hello

When I study NormalDemo code, I find code as below

/* Program the Security Byte in the Flash Configuration Field to an unsecure value */
returnCode = pFlashProgramLongword(&flashSSDConfig, 0x40C, 4, \
(UINT32)(&unsecure_key), pFlashCommandSequence);
if (FTFx_OK != returnCode)
{
ErrorTrap(returnCode);
}

It seems to unlock some security function by writing 4 bytes data from 0x40C.

But I can't find any data sheet talked about memory mapping(0x40C).

Could somebody help me ??

Thanks a lot

Re: Flash security Byte

mjbcswitzerland — Wed, 22 Feb 2012 19:06:39 GMT

The FLASH configuration is described in the Flash memory module. In the K60 user's manual Rev. 5 this is chapter 28.3.1. The Flash configuration parameters are read from address 0x00000400 at reset and its structure is shown below.

typedef struct stKINETIS_FLASH_CONFIGURATION                             // loaded from FLASH 0x00000400 at reset{    unsigned char  ucBackdoorComparisonKey[8];    unsigned char  ucProgramFlashProtection[4];    unsigned char  ucFlashSecurity;    unsigned char  ucNonvolatileOption;    unsigned char  ucEEPROM_protection;    unsigned char  ucDataFlashProtection;} KINETIS_FLASH_CONFIGURATION;

Regards

Mark

Re: Flash security Byte

Schani — Thu, 23 Feb 2012 13:52:23 GMT

Dear Mark,

I got it .

Thank for your help.

Best Regards,

Schani

Re: Flash security Byte

Schani — Thu, 23 Feb 2012 15:35:51 GMT

Dear Mark

BTW, pFlashProgramLongword function of this code(NormalDemo)

/* Program the Security Byte in the Flash Configuration Field to an unsecure value */
returnCode = pFlashProgramLongword(&flashSSDConfig, 0x40C, 4, \
(UINT32)(&unsecure_key), pFlashCommandSequence);
if (FTFx_OK != returnCode)
{
ErrorTrap(returnCode);
}

K60 flash command (FCMD: 0x06) is used,

But, why can't I find any information described this command at K60 Sub-Family

Reference Manual Rev. 2, Dec 2011 or any offical documents?

It just lists FCMD

0x00 Read 1s Block
0x01 Read 1s Section
0x02 Program Check
0x03 Read Resource
0x07 Program Phrase
0x08 Erase Flash Block
0x09 Erase Flash Sector
0x0B Program Section
0x40 Read 1s All Blocks
0x41 Read Once
0x43 Program Once

0x44 Erase All Blocks
0x45 Verify Backdoor Access Key
0x46 Swap Control
0x80 Program Partition
0x81 Set FlexRAM Function

Do you know any detail information about FCMD: 0x06 command??

Thank you..

Re: Flash security Byte

admin — Thu, 17 May 2012 22:07:45 GMT

It looks like your FTFL flash command list is out-of-date. Here is the latest from rev 6 of the manual.

0x00 Read 1s Block
0x01 Read 1s Section
0x02 Program Check
0x03 Read Resource
0x06 Program Longword

~~0x07 Program Phrase~~
0x08 Erase Flash Block
0x09 Erase Flash Sector
0x0B Program Section
0x40 Read 1s All Blocks
0x41 Read Once
0x43 Program Once

0x44 Erase All Blocks
0x45 Verify Backdoor Access Key

0x46 Swap Control

0x80 Program Partition
0x81 Set FlexRAM Function