Otp.bin Seeprom.bin [10000+ RELIABLE]

SEEPROM stands for Serial Electrically Erasable Programmable Read-Only Memory.

In the context of seeprom.bin, this usually refers to the NVRAM (Non-Volatile RAM) partition or an external EEPROM chip holding configuration data.

Unlike OTP, SEEPROM is rewritable (though with a limited cycle life, typically 100k to 1M writes). The seeprom.bin file is a raw dump of this memory. otp.bin seeprom.bin

Typical contents of SEEPROM:

| Tool | Purpose | Supported files | |------|---------|------------------| | seeprom-tools (Linux) | Dump/verify/restore serial EEPROM | seeprom.bin | | otpdump (custom) | Parse e-fuse maps for AMLogic, Rockchip | otp.bin | | binwalk | Analyze entropy, find embedded blobs | Both | | hexdump -C | Visual inspection | Both | | Lockpick_RCM (Switch) | Extract secure keys & OTP | otp.bin, seeprom.bin | # Find current MAC (assuming ASCII or hex

Example analysis command:

# Check entropy of OTP (should be high)
ent otp.bin
# Compare two SEEPROM dumps
diff -y <(hexdump -C seeprom_old.bin) <(hexdump -C seeprom_new.bin)

# Find current MAC (assuming ASCII or hex at offset 0x04)
hexdump -C seeprom.bin | grep -i "mac"
# Modify (example: offset 0x04, write new MAC)
printf '\x00\x11\x22\x33\x44\x55' | dd of=seeprom.bin bs=1 seek=4 conv=notrunc

Manufacturers include both in full device images to preserve: Manufacturers include both in full device images to

For SEEPROM via I²C (Linux):

# Detect SEEPROM on bus 0, address 0x50
i2cdetect -y 0
# Dump 32KB from 0x50 to a file
dd if=/dev/i2c-0 of=seeprom.bin bs=1 count=32768 skip=0

For OTP via JTAG (OpenOCD script):

# Assuming CPU is halted
targets
mdw 0x1FFFF000 0x40   # Read 256 bytes of OTP region
dump_image otp.bin 0x1FFFF000 0x100

For systems like Nintendo Switch (using Hekate or Lockpick): The payloads Lockpick_RCM.bin and Hekate can dump both otp.bin and seeprom.bin directly to an SD card.