SRAM Access Time in Hspice

[electronics20]

Dear all
How to measure SRAM access time by hspice? plz help me.
Many Thanks in advance

 

[erikl]

Valid clock edge ---> output valid

 

[electronics20]

Would u plz explain more? thanks

 

[erikl]

Apply a valid address, which selects - via the address decoder - the respective address line and bit lines. After the setUp time you apply an input clock. The time from the active clock edge until the address bits show their valid values is the access time (read access).

There are also self timed SRAMs, where an address transition initiates memory operation. In that case the access time is from address valid to address content output valid.