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Hi Xiaoping,
I think should be
.SECTION MODEDATA ,LOCATE =0xFFFDF
.data.b 0x00
;MB90F462A
.SECTION FLASH_SECURITY, LOCATE =0xFF001
;MB90F463A
; .SECTION FLASH_SECURITY, LOCATE =0xFE001
.data.b 0x01
.END __start
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Hi,
Do you mean "protect the content of the flash memory from being read from external pins" by " flash protected "?
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Hi Roy,
Yes.The customer don't want the program be read by others.
在 2019-04-22 11:38:57,RoyL_01 <community-manager@cypress.com> 写道:
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>Cypress Developer Community
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>flash protected using CY90460
>reply from RoyL_01 in 8-bit,16-bit and 32-bit Proprietary - View the full discussion
>Hi,
>Do you mean "protect the content of the flash memory from being read from external pins" by " flash protected "?
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>| Following flash protected using CY90460 in these streams: Inbox |
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Refer to this description:
One predefined address of the flash memory is assigned to the Flash Security Controller (MB90F462,
MB90F462A: FF0001H; MB90F463A: FE0001H). If the protection code of "01H" is written in this address,
access to the flash memory is restricted. Once the flash memory is protected, preforming the chip erase
operation only can unlock the function otherwise read/write access to the flash memory from any external
pins is not generally possible.
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Hi Roy ,
In .asm file ,
.SECTION MODEDATA ,LOCATE =0xFFFDF
.data.b 0x00
.END __start
If is this change right?I don't have a chip now .
.SECTION MODEDATA ,LOCATE =0xFFFDF
.data.b 0x00
.SECTION CONST,LOCATE =0xFFFFF
.data.b 0x01
.END __start
Thanks.
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What's each line of below doing? Write data 00 to address 0xFFFDF, and 01 to 0xFFFFF?
.SECTION MODEDATA ,LOCATE =0xFFFDF
.data.b 0x00
.SECTION CONST,LOCATE =0xFFFFF
.data.b 0x01
.END __start
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Hi Xiaoping,
I think should be
.SECTION MODEDATA ,LOCATE =0xFFFDF
.data.b 0x00
;MB90F462A
.SECTION FLASH_SECURITY, LOCATE =0xFF001
;MB90F463A
; .SECTION FLASH_SECURITY, LOCATE =0xFE001
.data.b 0x01
.END __start