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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMS320C6472ECTZ датащи(PDF) 77 Page - Texas Instruments |
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TMS320C6472ECTZ датащи(HTML) 77 Page - Texas Instruments |
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77 / 269 page  TMS320C6472 www.ti.com SPRS612G – JUNE 2009 – 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 Figure 3-7 and described in Table 3-13, 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. 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 Submit Documentation Feedback Product Folder Link(s) :TMS320C6472 |
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