SWRA657 June   2020 CC3100 , CC3200

 

  1.   SimpleLink Wi-Fi CC3100, CC3200 Serial Flash
    1.     Trademarks
    2. 1  Introduction
    3. 2  How File System Content Gets to the Serial Flash
    4. 3  File System Guidelines
    5. 4  User File Mathematics
    6. 5  System and Configuration Files
      1. 5.1 Description
      2. 5.2 Memory Consumption
        1. 5.2.1 CC3200 Use Case
        2. 5.2.2 Host Driver Mapping
        3. 5.2.3 Minimum Flash Size
    7. 6  Implementing File System Features From Host Processor
      1. 6.1 Overview
      2. 6.2 File Listing
        1. 6.2.1 Requirements
        2. 6.2.2 Procedure
      3. 6.3 Free/Occupied Space
        1. 6.3.1 Requirements
        2. 6.3.2 Procedure
      4. 6.4 File Appending
        1. 6.4.1 Requirements
        2. 6.4.2 Procedure
    8. 7  Factors to Consider in Designing With Serial Flash
      1. 7.1 Serial Flash Vendor and Part Number Selection
      2. 7.2 Supported Flash Types
      3. 7.3 Frequent Write Operations
        1. 7.3.1 Serial Flash Access by the Wi-Fi System"
        2. 7.3.2 Seral Flash Access by the WiFi System
          1. 7.3.2.1 System Files
          2. 7.3.2.2 User Files
      4. 7.4 Sudden Power Off (power removal during a write/erase phase)
        1. 7.4.1 Battery Powered Systems
        2. 7.4.2 Line Powered Systems
    9. 8  Design Recommendations for Ensuring the Integrity of the Power Supply to the Serial Flash
      1. 8.1 Overview
      2. 8.2 Key Points
      3. 8.3 Brown-Out Mitigation Techniques for New Self-Hosted CC3200 Designs
    10. 9  Recommended Best Practices
    11. 10 Implications of Data Integrity Compromise to CC3100/CC3200
      1. 10.1 Recovery
    12. 11 References

7.2 Supported Flash Types

For compatibility with the CC3100/CC3200, the serial flash device must support the following commands and format:

  • Uniform sector erase size of 4K
  • Command 0x9F (read the device ID [JEDEC]). Procedure: SEND 0x9F, READ 3 bytes.
  • Command 0x05 (read the status of the serial flash). Procedure: SEND 0x05, READ 1 byte. Bit 0 is busy and bit 1 is write enable.
  • Command 0x06 (set write enable). Procedure: SEND 0x06, read status until write-enable bit is set.
  • Command 0xC7 (chip erase). Procedure: SEND 0xC7, read status until busy bit is cleared.
  • Command 0x03 (read data). Procedure: SEND 0x03, SEND 24-bit address, read n bytes.
  • Command 0x02 (write page). Procedure: SEND 0x02, SEND 24-bit address, write n bytes (0<n<256).
  • Command 0x20 (sector erase). Procedure: SEND 0x20, SEND 24-bit address, read status until busy bit is cleared.