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IDT49C460AFFB Datasheet(PDF) 15 Page - Integrated Device Technology

Part No. IDT49C460AFFB
Description  32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
Download  32 Pages
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT49C460AFFB Datasheet(HTML) 15 Page - Integrated Device Technology

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IDT49C460/A/B/C/D/E
32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FUNCTIONAL EQUATIONS
The equations below describe the IDT49C460 output val-
ues as defined by the value of the inputs and internal states.
DEFINITIONS
PA = D0
⊕ D1 ⊕ D2 ⊕ D4 ⊕ D6 ⊕ D8 ⊕ D10 ⊕ D12 ⊕ D16 ⊕ D17
⊕ D18 ⊕ D20 ⊕ D22 ⊕ D24 ⊕ D26 ⊕ D28
PB = D0 ⊕ D3 ⊕ D4 ⊕ D7 ⊕ D9 ⊕ D10 ⊕ D13 ⊕ D15 ⊕ D16 ⊕ D19
⊕ D20 ⊕ D23 ⊕ D25 ⊕ D26 ⊕ D29 ⊕ D31
PC = D0 ⊕ D1 ⊕ D5 ⊕ D6 ⊕ D7 ⊕ D11 ⊕ D12 ⊕ D13 ⊕ D16 ⊕ D17
⊕ D21 ⊕ D22 ⊕ D23 ⊕ D27 ⊕ D28 ⊕ D29
PD = D2
⊕ D3 ⊕ D4 ⊕ D5 ⊕ D6 ⊕ D7 ⊕ D14 ⊕ D15 ⊕ D18 ⊕ D19
⊕ D20 ⊕ D21 ⊕ D22 ⊕ D23 ⊕ D30 ⊕ D31
PE = D8
⊕ D9 ⊕ D10 ⊕ D11 ⊕ D12 ⊕ D13 ⊕ D14 ⊕ D15 ⊕ D24
⊕ D25 ⊕ D26 ⊕ D27 ⊕ D28 ⊕ D29 ⊕ D30 ⊕ D31
PF = D0
⊕ D1 ⊕ D2 ⊕ D3 ⊕ D4 ⊕ D5 ⊕ D6 ⊕ D7 ⊕ D24 ⊕ D25
⊕ D26 ⊕ D27 ⊕ D28 ⊕ D29 ⊕ D30 ⊕ D31
PG = D8
⊕ D9 ⊕ D10 ⊕ D11 ⊕ D12 ⊕ D13 ⊕ D14 ⊕ D15 ⊕ D16
⊕ D17 ⊕ D18 ⊕ D19 ⊕ D20 ⊕ D21 ⊕ D22 ⊕ D23
PH0 = D0
⊕ D4 ⊕ D6 ⊕ D7 ⊕ D8 ⊕ D9 ⊕ D11 ⊕ D14 ⊕ D17 ⊕ D18
⊕ D19 ⊕ D21 ⊕ D26 ⊕ D28 ⊕ D29 ⊕ D31
PH1 = D1
⊕ D2 ⊕ D3 ⊕ D5 ⊕ D8 ⊕ D9 ⊕ D11 ⊕ D14 ⊕ D17 ⊕ D18
⊕ D19 ⊕ D21 ⊕ D24 ⊕ D25 ⊕ D27 ⊕ D30
PH2 = D0
⊕ D4 ⊕ D6 ⊕ D7 ⊕ D10 ⊕ D12 ⊕ D13 ⊕ D15 ⊕ D16
D20
⊕ D22 ⊕ D23 ⊕ D26 ⊕ D28 ⊕ D29 ⊕ D31
DATA CORRECTION
The tables below indicate which data output bits are
corrected depending upon the syndromes and the CODE
ID1,0 position. The syndromes that determine data correction
are, in some cases, syndromes input externally via the CB
inputs and, in some cases, syndromes input externally by that
EDC (Si are the internal syndromes and are the same as the
value of the SCi output of that EDC if enabled).


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