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shangdawei1
Visitor II
October 9, 2005
Question

STR710 : Debug Protection to avoid software piracy

  • October 9, 2005
  • 8 replies
  • 1245 views
Posted on October 09, 2005 at 09:43

STR710 : Debug Protection to avoid software piracy

    This topic has been closed for replies.

    8 replies

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    shangdawei1Author
    Visitor II
    August 30, 2005
    Posted on August 31, 2005 at 00:48

    The Flash module has a further level of protection:

    If bit DBGP of FLASH_NVAPR0 is programmed at 0, the device becomes Debug Access

    protected: debug features, JTAG pins and flash Test Modes are disabled.

    In EXTMEM mode the system boot is performed from the external memory, block 0 (CSN0 is

    activated). The external memory is also mapped at address 0h (see PRCCU_BOOTCR

    register).

    Now somebody setup a Debug Protection STR710 In EXTMEM mode the system boot, Can somebody access internal Flash via external flash code (Code start from 0x60000000/0x00000000 access Internal Flash ar 0x40000000)?

    [ This message was edited by: shangdawei on 31-08-2005 04:28 ]

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    shangdawei1Author
    Visitor II
    August 30, 2005
    Posted on August 31, 2005 at 01:01

    STR711/STR712 have not EMI, so they can not boot from EXTMEM

    S
    shangdawei1Author
    Visitor II
    August 30, 2005
    Posted on August 31, 2005 at 01:14

    Quote:

    On 31-08-2005 at 04:18, Anonymous wrote:

    Now somebody setup a Debug Protection STR710 In EXTMEM mode the system boot, Can somebody access internal Flash via external flash code (Code start from 0x60000000/0x00000000 access Internal Flash ar 0x40000000)?

    [ This message was edited by: shangdawei on 31-08-2005 04:28 ]

    if it is true, can EXTMEM boot be disabled for Debug Protection STR710 ?

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    shangdawei1Author
    Visitor II
    September 1, 2005
    Posted on September 02, 2005 at 00:37

    Any idea ?

    N
    nopti_albe
    Visitor II
    September 2, 2005
    Posted on September 02, 2005 at 10:20

    I have a MB393 with str710, but i can tell you for sure that i wouldn't risk to put the protections on just to see if it works :) Don't expect somebody else to do that for you ;)

    I'm wondering too if it's worth the effort to use the security features.

    S
    shangdawei1Author
    Visitor II
    October 7, 2005
    Posted on October 07, 2005 at 10:31

    can EXTMEM boot be disabled after Debug Protection of STR710 ?

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    shangdawei1Author
    Visitor II
    October 9, 2005
    Posted on October 09, 2005 at 04:19

    >>If debug protection is enabled, after RESET the EMI will be

    >>disabled and the STR710 will not be able to boot from the

    >>external memory.

    if EMI is disabled, then can i use address/data bus to access LCD and SRAM etc. at Bank1, Bank2, Bank3?

    or is Bank0 of EMI(0x6000 0000 - 0x60FF FFFF) disabled only?

    S
    shangdawei1Author
    Visitor II
    October 9, 2005
    Posted on October 09, 2005 at 09:43

    Can i execute code from int. flash after reset to reenable EMI ?

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