Consider the following setup timing report.

Fill in the boxes 1 and 2 with the right numerical values (keep 3 decimal places).

1 [Fill in the blank],

2 [Fill in the blank],

Question

Consider the following setup timing report.

Fill in the boxes 1 and 2 with the right numerical values (keep 3 decimal places).

1 [Fill in the blank],

2 [Fill in the blank],

BlackTom AI · Accepted Answer

Here is a detailed, step-by-step examination of each option for the two fill-in blanks in the timing diagram question.

First, restating the problem and the available choices:
- Question: Fill in the boxes 1 and 2 with the right numerical values (keep 3 decimal places).
  1 [Fill in the blank],
  2 [Fill in the blank],
- Answer options (two choices to fill the blanks are):
  - 0.275
  - 1.260

Option-by-option analysis:
- Analyzing Option A for Box 1 (0.275) and Box 2 (1.260) in sequence:
  - Since the diagram shows a timing path involving input1 propagating through a combo-logic path into a D flip-flop, and then a subsequent path (Path 2) toward the next stage, the numbers typically correspond to specific stage delays such as combinational delay, clock-to-Q delay, and any subsequent path delays. The value 0.275 for the first box would represent a relatively small delay, consistent with a modest combinational delay along Path 1 or a small portion of the path from Input1 to the first flip-flop’s input after the clock edge. This aligns with a scenario where the initial path delay is short before the data reaches the first register.
  - The second box value (1.260) is larger and would correspond to a longer downstream delay, likely incorporating the clock-to-Q delay of the first flip-flop plus the propagation through Path 2’s logic up to the second flip-flop’s input, or possibly including the timing impact to the subsequent stage (and/or any additional routing delay) that sums to about 1.260 time units. In many timing diagrams, a value around 1.2–1.3 units is plausible for the combined clock-to-Q plus downstream combinational delay to the next register's input or to the output of interest.
  - Therefore, Option A (assigning 0.275 to Box 1 and 1.260 to Box 2) fits a logical sequence where the first box captures a smaller initial delay, and the second box captures a larger cumulative delay as the signal progresses through the chain of logic and registers.

- Analyzing Option B for Box 1 (0.275) and Box 2 (1.260):
  - If we suppose the assignment flips or swaps the intended mapping (i.e., Box 1 is 1.260 and Box 2 is 0.275), this would suggest Box 1 holds a larger delay early in the path and Box 2 a smaller delay later. This would be inconsistent with the usual flow in a two-stage path where the early stage’s delay tends to be smaller (a short combinational segment) and the later stage accumulates more delay due to clock-to-Q plus longer paths. Consequently, this option would generally be less plausible given how timing paths typically accumulate delay as they progress through stages.
  - Additionally, placing 1.260 in Box 1 would imply a relatively large initial delay before reaching the first register or node, which may not align with the diagram’s depicted immediate connection from the input through a relatively short combinational block to the first D flip-flop. This mismatch makes Option B less consistent with a standard two-stage timing progression in such diagrams.

Summary of reasoning about both options:
- The structure of the timing diagram commonly supports a smaller initial delay (Box 1) followed by a larger cumulative delay (Box 2) as the signal traverses through the first flip-flop, the intermediate path, and then toward the second flip-flop or output. This pattern is well-matched by assigning 0.275 to Box 1 and 1.260 to Box 2.
- If one swapped the values (i.e., Box 1 = 1.260 and Box 2 = 0.275), the expected progression of delays would not align as cleanly with the depicted two-stage path, making that arrangement less plausible given typical timing chains.

Conclusion (within this reasoning framework): the combination Box 1 = 0.275 and Box 2 = 1.260 best fits the logical progression of delays along the shown timing path, aligning with common practice of smaller early-stage delays and larger cumulative downstream delays in a two-stage timing diagram.

ECE260B_WI25_A00 ECE260B Midterm - Winter 2025

Consider the following setup timing report. Fill in the boxes 1 and 2 with the right numerical values (keep 3 decimal places). 1 [Fill in the blank], 2 [Fill in the blank],

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