Document Outline

• 1. INTRODUCTION
  • 1.1 Important Notice Regarding Discontinued DS2251T/DS2252T
  • 1.2 Software Security
  • 1.3 Product Description
  • 1.4 Introduction to the DS5250 High-Speed Secure Microcontroller
• 2. SELECTOR GUIDE
• 3. SECURE MICROCONTROLLER ARCHITECTURE
  • 3.1 Bus Organization
  • 3.2 CPU Registers
• 4. PROGRAMMER’S GUIDE
  • 4.1 Secure Microcontroller Memory Organization
    • 4.1.1 Internal Registers
    • 4.1.2 Program and Data Memory
  • 4.2 DS5000 Series Memory Organization
  • 4.3 DS5000 Memory Map Control
  • 4.4 DS5001/DS5002 Memory Organization
  • 4.5 DS5001/DS5002 Memory-Mapped Peripherals
  • 4.6 DS5001/DS5002 Memory Map Control
  • 4.7 Loading and Reloading Program Memory
  • 4.8 Special Function Registers
  • 4.9 Instruction Set
  • 4.10 Addressing Modes
  • 4.11 Program Status Flags
• 5. MEMORY INTERCONNECT
• 6. LITHIUM/BATTERY BACKUP
  • 6.1 Data Retention
• 7. POWER MANAGEMENT
  • 7.1 Idle Mode
  • 7.2 Stop Mode
  • 7.3 Voltage Monitoring Circuitry
  • 7.4 Power-Fail Interrupt
  • 7.5 Total Power Failure
  • 7.6 Partial Power Failures
• 8. SOFTWARE CONTROL
  • 8.1 Timed Access
  • 8.2 Watchdog Timer
  • 8.3 CRC Memory Verification
    • 8.3.1 Automatic CRC on Power-Up Feature
• 9. FIRMWARE SECURITY
  • 9.1 Security Lock
  • 9.2 RAM Memory
  • 9.3 Encrypted Memory
  • 9.4 Encryption Algorithm
  • 9.5 Encryption Key
  • 9.6 Encryption Key Selection and Loading
  • 9.7 Dummy Bus Access
  • 9.8 On-Chip Vector RAM
  • 9.9 Self-Destruct Input
  • 9.10 Microprobe/Die Top Coating
  • 9.11 Random Number Generator
  • 9.12 Security Summary by Part
  • 9.13 Application: Advanced Security Techniques
• 10. RESET CONDITIONS
  • 10.1 Reset Sources
    • 10.1.1 Power-On Reset
    • 10.1.2 No-VLI Power-On Reset
    • 10.1.3 External Reset
    • 10.1.4 Watchdog Timer Reset
  • 10.2 Memory Map
  • 10.3 Interrupts
  • 10.4 Timers
  • 10.5 Transient Voltage Protection
• 11. INTERRUPTS
  • 11.1 Interrupt Sources
  • 11.2 External Interrupts
  • 11.3 Timer Interrupts
  • 11.4 Serial Port Interrupts
  • 11.5 Power-Fail Warning Interrupt
  • 11.6 Simulated Interrupts
  • 11.7 Interrupt Priorities
  • 11.8 Interrupt Acknowledge
• 12. PARALLEL I/O
  • 12.1 Output Functions
  • 12.2 Input Function
  • 12.3 Read-Modify-Write Instructions
  • 12.4 Reprogrammable Peripheral Controller (RPC)
  • 12.5 RPC Interrupts
  • 12.6 RPC Protocol
  • 12.7 DMA Operation
• 13. PROGRAMMABLE TIMERS
  • 13.1 Functional Description
  • 13.2 Mode 0
  • 13.3 Mode 1
  • 13.4 Mode 2
  • 13.5 Mode 3
• 14. SERIAL I/O
  • 14.1 Function Description
  • 14.2 Baud Rate Generation
  • 14.3 Synchronous Operation (Mode 0)
  • 14.4 Asynchronous Operation
• 15. CPU TIMING
  • 15.1 Oscillator
  • 15.2 Instruction Timing
  • 15.3 Expanded Program Memory Timing
  • 15.4 Expanded Data Memory Timing
• 16. PROGRAM LOADING
  • 16.1 Invoking the Bootstrap Loader
  • 16.2 Invoking the Bootstrap Loader on DS5000 Series Devices
  • 16.3 Invoking the Bootstrap Loader on DS5001/DS5002 Series Devices
  • 16.4 Exiting the Loader
  • 16.5 Serial Program Load Mode
  • 16.6 Auto-Baud Rate Detection
  • 16.7 Bootstrap Loader Initialization
  • 16.8 Command Line Interface
  • 16.9 Command Line Syntax
  • 16.10 Command Summaries
  • 16.11 Error Messages
  • 16.12 Intel Hex File Format
  • 16.13 Parallel Program Load Operation
  • 16.14 Parallel Program Load Mode
  • 16.15 Parallel Programming Concerns
  • 16.16 RPC Program Mode Operation
• 17. REAL-TIME CLOCK (RTC)
  • 17.1 DS5000T/DS2250T RTC
  • 17.2 Important DS5000T/DS2250T Application Note
  • 17.3 Registers
  • 17.4 Special Bits
  • 17.5 DS2251T/DS2252T RTC
  • 17.6 Memory Map
  • 17.7 DS2251T/DS2252T RTC Interrupts
• 18. TROUBLESHOOTING
  • 18.1 Unexplained Device Resets
  • 18.2 DS5000T/DS2250T Reports the Incorrect Time/Date
  • 18.3 RAM Loses Data When Powered Down
  • 18.4 Unable to Invoke Stop Mode
  • 18.5 Serial Port Does Not Work
  • 18.6 Program Will Not Execute
  • 18.7 Do’s and Don’ts
• 19. INSTRUCTION SET DETAILS