we know microprocessor at a single instant can execute either write instruction or read instruction which can be done by sending a read or write bar signal low or high or vice versa..( if read/write bar=1,perform read function and no write function )how ever in intel family, they have been provided separate pins for these two operations.. why is it so?
why two separate pins for read and write?
- Thread starter iitravi
- Start date
They do it because memory chips have separate inputs for Read and Write.
On devices with RD* and WR* they are both valid stobe signals syncronized with the clock.
On devices with R/W* and E-Clock you have to combine those two signals to get a valid stobe to the memory device.
Is that as clear as mud?
On devices with RD* and WR* they are both valid stobe signals syncronized with the clock.
On devices with R/W* and E-Clock you have to combine those two signals to get a valid stobe to the memory device.
Rich (BB code):
RDS* = !(R/W* & E-Clock) ; negative logic read data strobe
WDS* = !(!(R/W*) & E-Clock) ; negative logic write data strobe
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