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AT97SC3201 Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT97SC3201 Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 7 page 2 AT97SC3201 2015DS-TPM–7/04 A real-time clock function is available using an external battery and crystal. The chip provides tamper detection if the battery or crystal are removed or tampered with, and the current time value can be signed by the appropriate internal keys to verify its accuracy. (Contact Atmel for current status of this option.) The battery detector can be used without the crystal for lower cost. In this mode, the TPM can indicate to the system if it has been removed from the PC in any way and can also take actions internally. The chip uses a dynamic internal memory management scheme to store from 10 to 20 keys. Other than the standard TCG commands (TPM_Evictkey, TPM_Loadkey), no system inter- vention is required to manage this internal key cache. The TPM is offered to OEM manufacturers as a turnkey solution, including the firmware inte- grated on the chip. In addition, Atmel provides the necessary driver software for integration into certain operating systems, along with BIOS drivers. A TCG Software Stack (TSS), also supplied by Atmel and available under license, provides communication support to any appli- cation using MSCAPI or PKCS #11 Cryptographic APIs. (Contact Atmel for a complete list of operating systems supported.) F u l l d o c u m e n t at i on f o r T C G pri m i t i v es c an be f oun d o n t he T C G W eb s i t e , www.trustedcomputinggroup.org. This specification includes only mechanical and electrical information. |
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