DRAM
What does the DRAM timing parameter tRCD represent?
- AThe refresh period
- BThe time from closing a row until the next row can be opened
- CThe time from activating a row until it can be read or written using a column address
Show answer and explanation
Answer: C. The time from activating a row until it can be read or written using a column address
tRCD (RAS to CAS delay) is the time required after an activate command opens a row before read or write commands can be issued to that row. The time from closing a row to opening the next is tRP (precharge time).
- A. The refresh period is specified by parameters such as tREFI.
- B. The time from closing a row to opening the next is tRP.
- C. Correct. It is the time from row activation to column access.