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TA235 Fiches technique(PDF) 4 Page - STMicroelectronics |
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TA235 Fiches technique(HTML) 4 Page - STMicroelectronics |
4 / 6 page TA 235 4/6 AI03411 tCLAX tCHAX tWHDX tDVWH VALID SRD A0-A10 G DQ0-DQ7 RC tCHWH tWHRL C1 W RP tPHWL R1 tAVCL tAVCH R2 C2 tWLWH tWHWL RB VPP tVPHWH tWHGL tQVVPL DIN1 DIN2 Write erase or program setup Write erase confirm or valid address and data Automated erase or program delay Read Status Register Data Ready to write another command tWLCH The A/A Mux Interface bus operation is similar to a standard flash programming protocol with the exception that addressing is latched using the Row/Column Select inputs. The lower address signals (A0–A10) determine the Row Address bits and the higher address signals (A11-A18) determine the Column Address bits. Figure 5 shows the Address/Address Multiplexed Interface Read Protocol, and Figure 6 the Address/Address Multiplexed Interface Write Protocol. Firmware Security Intel plans to add new security and software functions to their chip-sets in a move that will boost the profile of its future processors for the multimedia and electronic markets. These are the key features of the FWH that is basically a flash with locks on its read and write capabilities that can be opened using a cryptographic protocol. The hardware security functions include a cryptographic engine to authenticate ‘digital certificates’ which Intel or a third party could load in. The FWH could hold multiple certificates, each able to grant specific features and ensure a software program licensed to one user could not be copied and run on another machine. In addition, the certificates will act as unique serial numbers, identifying a given machine in any Internet or corporate network transaction. Appendix 1 The Firmware Hub comes in two standard packages of 32 pins PLCC (as shown in Figure 7) and 40 pins TSOP (as shown in Figure 8). References 1. Intel’s security plans raise fear from PC build- ers, Rick Boyd-Merritt & Mark Carroll, EDTN News, 15 Dec 1998. Figure 6. Address/Address Multiplexed Interface Write Protocol |
Numéro de pièce similaire - TA235 |
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Description similaire - TA235 |
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