Texas Instruments TMS320C6472 Evaluation Module TMDSEVM6472LE TMDSEVM6472LE Datenbogen
Produktcode
TMDSEVM6472LE
PRODUCTPREVIEW
SPRS612G
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JUNE 2009
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REVISED JULY 2011
3.6.3
Key-Based Protection for HOSTPRIV and PRIVPERM Registers (PRIVKEY)
Key-based protection of HOSTPRIV and PRIVPERM is provided for a higher level of protection or control
over changing the permission levels. The PRIVKEY register, shown in
over changing the permission levels. The PRIVKEY register, shown in
and described in
, is needed to service the key requirement. Updates to the HOSTPRIV and PRIVPERM
registers are only allowed when PRIVKEY contains the lower 16-bit key value (BEA7h). Protection is
provided by a following write to PRIVKEY to clear the register. The PRIVKEY is a 32-bit register with the
lower 16 bits as key field and upper 16 bits reserved to 0.
provided by a following write to PRIVKEY to clear the register. The PRIVKEY is a 32-bit register with the
lower 16 bits as key field and upper 16 bits reserved to 0.
31
16
Reserved
R/W-0000 0000 0000 0000
15
0
KEY
R/W-0000 0000 0000 0000
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Figure 3-7. Key-Based Protection Register (PRIVKEY)
Table 3-13. Key-Based Protection Register (PRIVKEY) Field Descriptions
Bit
Field
Value
Description
31:16
Reserved
Reserved
15:0
KEY
Key (BEA7h). These fields, [15:0], get updated only when KEY = BEA7h. Returns 0000h on read.
Copyright
©
2009
–
2011, Texas Instruments Incorporated
Device Configuration
77
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