Designed to meet the most stringent security validations of FIPS 140 and Common Criteria, the DS5240 is ideal for high-security designs required in the banking and financial industry.
The DS5240 is a high-speed 8051 compatible microcontroller with expanded addressing features. This device offers extended memory addressing of up to 4MB program and 4MB data and a 1kB stack (part of 5kB total SRAM) for high-level language support. The nonmultiplexed byte-wide bus leaves four 8-bit ports and one 6-bit port for user I/O application.
Security features include on-chip sensors to detect out-of-range environmental conditions to generate tamper response, fast write SRAM for rapid zeroing secure information for threat response, a Modulo Arithmetic Accelerator (MAA) using words up to 4096-bits in length for calculations including Public Key Infrastructure (PKI). The DS5240 provides a user Data Encryption Standard (DES) engine that provide both single and triple-DES cryptographic operations.
Advanced features of the DS5240 include 4 clock-per-machine cycle architecture, single cycle instructions execute in 160ns, dual data pointers with independent increment and decrement, automatic data pointer selection, programmable length MOVX instructions for fast and slow external devices, power management, and watchdog timer.
Complete Technical Information
Due to the strong cryptographic features of the DS5240, full disclosure of
confidential details are available from the microcontroller technical
support group. For a list of available documentation for the DS5240, go to
Complete Technical Information.
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