STR710 : Debug Protection to avoid software piracy

shangdawei1 · ‎2005-10-09

Posted on October 09, 2005 at 09:43

shangdawei1 · ‎2005-08-30

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 ]

shangdawei1 · ‎2005-08-30

Posted on August 31, 2005 at 01:01

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

shangdawei1 · ‎2005-08-30

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 ?

shangdawei1 · ‎2005-09-01

Posted on September 02, 2005 at 00:37

Any idea ?

nopti_albe · ‎2005-09-02

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.

shangdawei1 · ‎2005-10-07

Posted on October 07, 2005 at 10:31

can EXTMEM boot be disabled after Debug Protection of STR710 ?

shangdawei1 · ‎2005-10-08

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?

shangdawei1 · ‎2005-10-09

Posted on October 09, 2005 at 09:43

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