: Supports a vast range of chipsets including SC5735, SC7731, SC9830, and SC9860 , making it versatile for both older and modern Spreadtrum-based hardware.
| Byte Offset | Field | |-------------|-------| | 0–1 | # of bytes used / total size | | 2–3 | Memory type (DDR3 = 0x0B) | | 4–11 | Bank/row/col density | | 12–17 | SDRAM timings (CAS, tRCD, tRP, tRAS) | | 18–20 | Min cycle time (tCK) | | 21–23 | Row refresh/self refresh | | 24–31 | Module configuration | | 32–59 | Timings table (fine granularity) | | 60–61 | Manufacturer ID (JEDEC-assigned) | | 62 | Manufacturing location | | 63 | | | 64–116 | Module part number (ASCII) | | 117–125 | Serial number | | 126 | Manufacturing date week/year | | 127 | Final checksum (bytes 64–126) | spd flash tool r4.0.0001
| Feature | Description | |---------|-------------| | | I²C/SMBus (System Management Bus) access via SMBus host controller on motherboard | | Memory Types | DDR2, DDR3, DDR4 (partial/compatibility mode) | | Chip Density | 256-byte, 512-byte, 1KB, 2KB EEPROMs | | Checksum Handling | Auto-recalculate and write correct SPD checksum byte (Byte 63 or 127) | | Write Protection | Ability to disable/re-enable hardware write-protect via SMBus commands | | Batch Operations | Read/write all slots sequentially | | CLI Mode | Likely supports command-line arguments for automation | : Supports a vast range of chipsets including
1.0 Last updated: 2026-04-14 Classification: Technical reference only – use at your own risk. spd flash tool r4.0.0001