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chip 300 19 medium We've measured some electrical ...

作成日: 2026年7月31日

使用モデル GPT-5.6 Thinking by Chat01

質問

unknown-chip.png

chip
300
19
medium
We've measured some electrical signals from one of cybervillain Zoowee Blubberworth's designs. The chip's markings were sanded off but we can tell that it's still pretty new and possibly has valuable data on it. Can you figure out what chip it is?

Flag format is bushbash{<manufacturer-name>, <chip-name>}

All text should be lowercase. Do not include chip packaging information, for example if the manufacturer is bingus and the name of the chip is ABC12W3R4-TR, only include the chip name (ABC12W3R4) and the flag would be bushbash{bingus, abc12w3r4}. Any spaces should be substituted with underscore _.

Author: Eisverygoodletter

Python

python
from PIL import Image
img=Image.open('/mnt/data/unknown-chip.png')
img.size


(1380, 260)

Python

python
import numpy as np, pandas as pd, matplotlib.pyplot as plt, PIL
arr=np.array(img.convert('L'))
# print dark x coordinates for selected y rows
for y in [72,91,101,111,120,130,140,150,159,169,179]:
    xs=np.where(arr[y]<100)[0]
    # runs
    runs=[]
    if len(xs):
        s=prev=xs[0]
        for x in xs[1:]:
            if x>prev+1:
                runs.append((s,prev))
                s=x
            prev=x
        runs.append((s,prev))
    print(y, runs[:30], 'count', len(runs))

思考

Searched 5 websites

Worked for 1m 22s

回答

The capture is an SPI JEDEC ID transaction:

  • MOSI sends 10011111 → 0x9f, the Read JEDEC ID command.
  • MISO replies 11101111 01000000 00010101 → ef 40 15.
  • ef is Winbond’s manufacturer ID, and device ID 4015 maps to the W25Q16JV, a 16-Mbit SPI NOR flash chip. (static.datasheets.com)
text
bushbash{winbond, w25q16jv}

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