I read this in the Read before you post as i was wanting to know more about RAM and specifically Timings and what they mean. I read it a few times and dont really understand it.
like what determines these settings? is it the memory controller and it is restricted by the RAM modules?
what would be "great" timings for ddr2 800 ram?
3-3-2-6 ? can any no.s be replaced in the sequence?
Q: How does memory access work, and what do the timings stand for?
A:
MEMORY ACCESS:
1. tRCD (RAS to CAS Delay) 2-3 cycles, The row is selected by the Memory Controller.
2. CAS (Column Address Strobe) 2,2.5,3 cycles (DDR), The Memory Controller selects the column and now the ROW is
ACTIVE, and the READ COMMAND is sent.
3. Data is sent to the DQ pins after CAS delay.
4. tRAS (Row address Strobe) 6 cycles, The module waits a certain period of time for the data to be active.
5. tRP (RAS precharge) 2 cycles, The Memory Controller DEACTIVATES the row.
6. Memory Cycle repeats as requested by the Memory Controller.
The timings are represented as follows:
2-3-2-6 1T (CAS, tRCD, tRP, tRAS)
thanks for trying to help me understand
like what determines these settings? is it the memory controller and it is restricted by the RAM modules?
what would be "great" timings for ddr2 800 ram?
3-3-2-6 ? can any no.s be replaced in the sequence?
Q: How does memory access work, and what do the timings stand for?
A:
MEMORY ACCESS:
1. tRCD (RAS to CAS Delay) 2-3 cycles, The row is selected by the Memory Controller.
2. CAS (Column Address Strobe) 2,2.5,3 cycles (DDR), The Memory Controller selects the column and now the ROW is
ACTIVE, and the READ COMMAND is sent.
3. Data is sent to the DQ pins after CAS delay.
4. tRAS (Row address Strobe) 6 cycles, The module waits a certain period of time for the data to be active.
5. tRP (RAS precharge) 2 cycles, The Memory Controller DEACTIVATES the row.
6. Memory Cycle repeats as requested by the Memory Controller.
The timings are represented as follows:
2-3-2-6 1T (CAS, tRCD, tRP, tRAS)
thanks for trying to help me understand