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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | - | 1 | || FILE: #0154.PLD |
| 2 | || PROJ: 20120600 |
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| 3 | || PART: G16V8-#0154 |
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| 4 | || |
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| 5 | || DEV : GAL16V8 |
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| 6 | || |
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| 7 | || DESC: DECODER RTC - CTC |
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| 8 | || |
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| 9 | | |
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| 10 | |GAL16V8A |
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| 11 | | |
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| 12 | || INPUT |
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| 13 | | 1:A0, 2:A1, 3:A2, 4:A3, 5:RW, 6:PHI2, 7:IOX, 8:EN, 9:WT, 11:-, |
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| 14 | || OUTPUT |
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| 15 | | 12:CS0, 13:ALE, 14:RRD, 15:RWE, 16:CS1, 17:IOR, 18:IOW, 19:CS2 |
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| 16 | | |
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| 17 | || |
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| 18 | | ACTIVE-LOW: CS0, RRD, RWE, CS1, IOR, IOW, CS2 |
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| 19 | | |
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| 20 | | PROPERTY: "SIMPLE" |
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| 21 | | |
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| 22 | | SIGNATURE: "0154 " |
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| 23 | | |
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| 24 | || RTC -> FE4C - FE4D |
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| 25 | | RTC = (IOX' & A3 & A2 & A1') |
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| 26 | || RTC ADDRESS REG => FE4C |
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| 27 | | RAR = (RTC & A0') |
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| 28 | || RTC DATA REG => FE4D |
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| 29 | | RDR = (RTC & A0) |
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| 30 | || RTC READ DATA REG. => FE4D |
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| 31 | | RRD = (RDR & RW & PHI2) |
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| 32 | || RTC WRITE DATA REG. => FE4D |
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| 33 | | RWE = (RDR & RW' & PHI2) |
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| 34 | || RTC WRITE ADDRESS REG => FE4C |
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| 35 | | ALE = (RAR & RW' & PHI2) |
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| 36 | | CS0 = (RDR & PHI2) |
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| 37 | || CTC -> FE48 - FE4B |
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| 38 | | CTC = (IOX' & A3' & A2') |
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| 39 | | CS1 = CTC |
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| 40 | | RD1 = (CTC & RW & WT & PHI2) || NO WAIT |
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| 41 | | RD2 = (CTC & RW & WT' & EN) || WAIT |
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| 42 | | WR1 = (CTC & RW' & WT & PHI2) || NO WAIT |
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| 43 | | WR2 = (CTC & RW' & WT' & EN) || WAIT |
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| 44 | | IOR = (RD1 # RD2) |
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| 45 | | IOW = (WR1 # WR2) |
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| 46 | || |
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| 47 | | CS2 = PHI2 |