Discussion
The write pulse width (twp) is the time for which :
Answer: B
The write pulse width is the time for which \(\overline{\mathrm{WR}}\) goes low.
The write control line of a memory chip or peripheral is normally active low, which is why it is written with a bar. A write is performed while \(\overline{\mathrm{WR}}\) is held low, and the timing parameter \(t_{wp}\) is the minimum duration of that low pulse needed for the data to be written reliably.
\(\overline{\mathrm{WR}}\) high is its inactive state, and an active-high WR is not the signal the timing diagram describes, so the other options describe the idle condition or the wrong signal.
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