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ADSP-2141L Datasheet(PDF) 2 Page - Analog Devices |
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ADSP-2141L Datasheet(HTML) 2 Page - Analog Devices |
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2 / 39 page  REV. 0 ADSP-2141L –2– PUBLIC KEY ACCELERATOR Accelerator for Math-Intensive Public Key Operations Diffie-Hellman Negotiate: <29 ms (1024-Bit Modulus, 180-Bit Exponent) RSA 1024-Bit Sign: <29 ms; RSA 1024-Bit Verify: 6 ms DSA Sign: <39 ms; DSA Verify: <66 ms KEY MANAGEMENT BLOCK Laser-Programmed Unique Triple-DES Cryptovariable Protects Off-Chip Storage Support for Secure Storage of Both Secret Keys and Public/Private Key Pairs Trust-Model Rules Enforcement Only Encrypted Keys May Be Exported Off the Chip Internal Key Cache for 15 Keys—Can Be Expanded to 700 Keys On-Chip Keys May Also Be Securely Stored Off-Chip, Allowing Unlimited Storage DSP CORE 40 MIPS Sustained Performance Single-Cycle Instruction Execution Single-Cycle Context Switch Zero-Overhead Looping Low Power Dissipation 16K Words (16K 24) On-Chip Program RAM 16K Words (16K 16) On-Chip Data RAM 64M Words Off-Chip Program and Data Memory Programmable 16-Bit Interval Timer with Prescale PCI BUS/CARDBUS INTERFACE 32-Bit 3.3 V Bus Interface 33 MHz or 40 MHz* Bus Speed Bus Master and Target Modes Can Directly DMA Between Crypto Functions and Other PCI Bus Agents *66 MHz speed pending chip characterization. GENERAL DESCRIPTION The ADSP-2141L SafeNet DSP is a highly integrated embedded security processor that incorporates a sophisticated, general purpose DSP, along with a number of high performance Cryp- tographic function blocks, as well as PCI, DMA and Serial EEPROM interfaces. It is fabricated in 0.35 µ CMOS triple- layer metal technology and uses a 3.3 V power supply. It is available in a 208-lead MQFP package with a commercial (0 °C to 70 °C) temperature range. DSP Core The DSP is a standard Analog Devices ADSP-218x core with full ADSP-2100 family compatibility. The ADSP-218x Core combines the base DSP components from the ADSP-2100 family with the addition of two serial ports, a 16-bit internal DMA port, a byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities, and on-chip program and data memory. The external memory interface of the 218x core has been extended to support up to 64M-words addressing for both program and data memory. Some core enhancements have been added in the ADSP-2141L, including on-chip security ROM and interrupt functions. Refer to the Analog Devices ADSP-2183 data sheet for further information. SafeNet CGX Library–Secure Kernel The SafeNet CGX Library is a crypto library embodied as firm- ware (a secure kernel) that is mask-programmed into ROM within the DSP. This solution protects the library from tampering. The CGX Library provides the Application Programming Interface (API) to applications that require security services from the ADSP-2141L. Those applications may be software executing in user mode on the DSP, or they may be external host software accessing the ADSP-2141L via a PCI bus. Approximately 40 Crypto commands—called CGX (CryptoGraphic eXtensions)— are provided at the API and a simple control block structure is used to pass arguments into the secure kernel and return status. The CGX library includes integrated drivers for the various hardware crypto blocks on the chip. This allows the program- mer to ignore those details and concentrate on other product design issues. The CGX library firmware runs under a protected mode state of the DSP as described in the Kernel Mode Control section following. This guarantees the security integrity of the system during the execution of CGX processes and, for example, prevents disclosure of cryptographic key data or tampering with a security operation. Kernel Mode Control The Kernel Mode Control subsystem is responsible for enforcing the security perimeter around the cryptographic functions of the ADSP-2141L. The device may operate in either user mode (kernel space is not accessible) or kernel mode (kernel space is accessible) at a given time. When in kernel mode, the kernel RAM and certain protected crypto registers and functions (kernel space) are accessible only to the CGX library firmware. The CGX Library executes host-requested macro-level functions and then returns control to the calling application. The kernel mode control subsystem resets the DSP should any security violation occur, such as attempting to access a protected memory location while in user mode. |
Similar Part No. - ADSP-2141L_15 |
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Similar Description - ADSP-2141L_15 |
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