fresh +200 is stale @enduml PlantUML Sprachreferenz (1.2020.22) 134 / 291 9.17 Digital Example 9 TIMING DIAGRAM 9.17 Digital Example @startuml scale 5 as 150 pixels clock clk with period 1 binary "enable" @:write_end+1 rw is low db is "0x0" addr is "0x23" @12 PlantUML Sprachreferenz (1.2020.22) 135 / 291 9.17 Digital Example 9 TIMING DIAGRAM dv is high @13 db is "0xFFFF" @20 en is low dv is low @21 db is "0x0" example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 9.17 Digital Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

"Client" as Client concise "Server" as Server PlantUML Sprachreferenz (1.2021.2) 194 / 405 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk with period 1 binary "enable" as en binary "R/W" "dataBus" as db concise "address bus" as addr PlantUML Sprachreferenz (1.2021.2) 195 / 405 10.17 Digital Example 10 TIMING DIAGRAM @6 as :write_beg @10 as :write_end @15 as :read_beg @19 as :read_end

"Client" as Client concise "Server" as Server PlantUML Sprachreferenz (1.2021.1) 182 / 383 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk with period 1 binary "enable" as en binary "R/W" "dataBus" as db concise "address bus" as addr PlantUML Sprachreferenz (1.2021.1) 183 / 383 10.17 Digital Example 10 TIMING DIAGRAM @6 as :write_beg @10 as :write_end @15 as :read_beg @19 as :read_end

"Client" as Client concise "Server" as Server PlantUML Sprachreferenz (1.2021.2) 184 / 388 10.17 Digital Example 10 TIMING DIAGRAM concise "Response freshness" as Cache Server is idle Client is idle Server -> Client@+25 : 304 Not Modified +25 is idle @Cache 75 is fresh +200 is stale @enduml 10.17 Digital Example @startuml scale 5 as 150 pixels clock clk with period 1 binary "enable" as en binary "R/W" "dataBus" as db concise "address bus" as addr PlantUML Sprachreferenz (1.2021.2) 185 / 388 10.17 Digital Example 10 TIMING DIAGRAM @6 as :write_beg @10 as :write_end @15 as :read_beg @19 as :read_end

fresh +200 is stale @enduml PlantUML Sprachreferenz (1.2020.23) 145 / 303 9.17 Digital Example 9 TIMING DIAGRAM 9.17 Digital Example @startuml scale 5 as 150 pixels clock clk with period 1 binary "enable" example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 9.17 Digital Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146