DRAM Detective · Case File 1.2
One Man Guards the Pass
The gate must open at the exact moment the data arrives — not a beat early, not a beat late.
Reading is a late reply — the host never knows exactly when it will land…
outside → gate → host
Fine
find the slot
within
one cycle
Fine
Coarse
count
which trip
the light is on
Coarse
1
2
3
4
5
6
Write sets the watch once; read guards the door once —
open too early and noise walks in, open too late and data leaks away.
One man guards the pass.
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