The DS5000FP is the original Secure Microprocessor chip in an 80-pin QFP. Based on nonvolatile RAM rather than ROM, it offers programming flexibility not possible with ordinary 8051s.
The program and data resources can be partitioned and managed by the user during and after installation. This facilitates frequent software upgrades, adaptive programs, customized systems, etc.
Different versions provide for memory space of 8, 32, or 64kbytes of NV CMOS SRAM. With a user-supplied lithium battery, the on-chip power management circuitry can maintain all nonvolatile resources for greater than 10 years in the absence of external power. A DS5000FP also provides crashproof operation in portable systems by saving the operating state and providing a power-fail reset, power-fail interrupt, and watchdog timer.
Optional security features include real-time memory encryption using a 48-bit user-selected encryption key and a security lock that over-writes memory if it is disturbed. The DS5000FP uses dummy cycles on the memory bus to foil pattern detection. The interrupt vector table is hidden on-chip.
The DS5000FP is ideal for any 8051-type application that requires versatile programming, reliability, and portability, such as data logging and battery-powered applications. It connects easily to a Dallas real-time clock for obtaining time-and date-stamped transactions.
关键特性
8-bit 8051-compatible microcontroller:
8051 instruction set
Four 8-bit bidirectional I/O ports
128-bytes scratchpad RAM
Two 16-bit timer/counters
1 UART
Reliability enhancements:
>10 years nonvolatile data retention
Early warning power-fail interrupt
Power-fail reset
Precision watchdog timer
User-supplied lithium battery-backed SRAM
Software security (optional):
Executes encrypted software using 48-bit key
Security lock prevents download
Unlocking destroys contents
Ease of use and adaptability:
8, 32 or 64kbytes nonvolatile SRAM for program and data storage
ROM-based Serial Bootstrap Loader
On-chip serial port for software downloaded in end system
Partitioned code and data segments
Nonmultiplexed bytewide address/data bus for memory access
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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