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|| FILE: #0056.PLD|| PROJ: 20120401|| PART: G26CV12-#0056|||| DEV : GAL26CV12|||| DESC: DECODER SCHEDE RAM 4Mb||||GAL26CV12||| INPUT| 1:A19, 2:A20, 3:A21, 4:A22, 5:A23, 6:PHI0, 8:RW, 9:ME, 10:PHI2,| 11:FE, 12:S0, 13:S1, 14:MW0, 28:LST,|| OUTPUT| 15:CS0, 16:CS1, 17:CS2, 18:CS3, 19:RD, 20:WR, 22:G,| 23:CS4, 24:CS5, 25:CS6, 26:CS7, 27:CSF|| ACTIVE-LOW: CS0, CS1, CS2, CS3, CS4, CS5, CS6, CS7, RD, WR, G, CSF||| SIGNATURE: "0056 "||||| --------------------------------------------------------|| S0, S1 -> SELEZIONE BLOCCO|| /MW0 -> QUALIFICA WRITE CON PHI0|| /FE -> ABILITA FLASH F00000 - F7FFFF (512K)|| /ME -> ABILITA RAM|| LST -> ABILITA SLOT (CSF) PER FLASH|| --------------------------------------------------------|||| BLOCCHI SELEZIONE RAM 4MB|| BLK0 -> 000000 - 3FFFFF (S0 = 0, S1 = 0)| BLK0 = (A23' & A22' & S1' & S0' & ME' & FE)|| BLK1 -> 400000 - 7FFFFF (S0 = 1, S1 = 0)| BLK1 = (A23' & A22 & S1' & S0 & ME' & FE)|| BLK2 -> 800000 - BFFFFF (S0 = 0, S1 = 1)| BLK2 = (A23 & A22' & S1 & S0' & ME' & FE)|| BLK3 -> C00000 - FFFFFF (S0 = 1, S1 = 1)| BLK3 = (A23 & A22 & S1 & S0 & ME' & FE)|| BK3F -> C00000 - FFFFFF (S0 = 1, S1 = 1) FLASH (FE=0, LST=1)| BK3F = (A23 & A22 & S1 & S0 & ME & FE' & LST)| SLF = (BK3F & A21 & A20 & A19')|| --------------------------------------------------------|||| SELEZIONE RAM| SLM = (BLK0 # BLK1 # BLK2 # BLK3)| SEL = (SLF # SLM)| CS0 = (SLM & A21' & A20' & A19' & PHI2)| CS1 = (SLM & A21' & A20' & A19 & PHI2)| CS2 = (SLM & A21' & A20 & A19' & PHI2)| CS3 = (SLM & A21' & A20 & A19 & PHI2)| CS4 = (SLM & A21 & A20' & A19' & PHI2)| CS5 = (SLM & A21 & A20' & A19 & PHI2)| CS6 = (SLM & A21 & A20 & A19' & PHI2)| CS7 = (SLM & A21 & A20 & A19 & PHI2)| G = SEL| CSF = (SLF & PHI2)| RD = (SEL & PHI2 & RW)| WRA = (SEL & PHI2 & RW' & MW0)| WRB = (SEL & PHI0 & RW' & MW0')| WR = (WRA # WRB)