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IDT49C465 Datasheet(PDF) 10 Page - Integrated Device Technology |
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IDT49C465 Datasheet(HTML) 10 Page - Integrated Device Technology |
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10 / 38 page  11.7 10 IDT49C465/A 32-BIT FLOW-THRU ERROR DETECTION AND CORRECTION UNIT MILITARY AND COMMERCIAL TEMPERATURE RANGES OPERATING MODE CHARTS SLICE IDENTIFICATION CODE ID 1 CODE ID 0 Slice Definition 0 0 32-bit Flow-Thru EDC 0 1 64-bit GENERATE Only EDC 1 0 64-bit EDC- Lower 32 bits (0-31) 1 1 64-bit EDC- Upper 32 bits (32-63) 2552 tbl 04 SLICE POSITION CONTROL Checkbit Buses Slice Position/ CODE Functional Operation PCBI CBI CBO SYO P ID SOE SOE SD Bus MOE MOE MD Bus Bus Bus Bus Bus Bus PERR PERR 1 0 Width = 32 32 8 8 8 8 4 1 0 0 Single 32-bit EDC unit Generate (1) 1 Sys. 0–31 0 Sys. Byte Mux — — CBs out — P in active Detect/Correct (2) 0 Pipe. latch 1 MD 0–31 — CBs in — Syn. out P out — 0 1 “64-bit Generate-only” 1 Sys. 32–63 1 Sys. 0–31 — — CBs out — — — 1 0 Lower word, 64-bit bus Generate (1) 1 Sys. 0–31 0 MD 0–31 — — PCBs out — P in active Detect/Correct (2) 0 Pipe. latch 1 MD 0–31 U-SYOout CBs in — Par.Synd P out — 1 1 Upper word, 64-bit bus Generate (1) 1 Sys. 32–63 0 MD 32–63 L-CBOout — F.CBs out — P in active Detect/Correct (2) 0 Pipe. latch 1 MD 32–63 — L-SYOout — Par.Cbits P out — NOTES: 2552 tbl 05 1. Checkbits generated from the data in the SD Latch. 2. Corrected data residing in the Pipe Latch. PCBI CBI CBO SYO P FUNCTIONAL MODE CONTROL Checkbit Buses Functional Mode of SD Bus PCBI CBI CBO SYO P MODE SOE SOE SD Bus MOE MOE MD Bus Bus Bus Bus Bus Bus PERR PERR 2 1 0 Width = 32 32 8 8 8 8 4 1 x1 1 “Normal” Generate 1 CPU Data 0 Pipe. latch — — CB out — P in active Correct 0 Pipe. latch 1 RAM Data — CB in — — P out — x1 0 “Generate-Detect” Generate 1 CPU Data 0 Pipe. latch — — CB out — P in active Detect 0 Pipe. latch 1 RAM Data — CB in — — P out — 000 “Error-Data-Output” 0 Err. D. latch — — — — — — — — x0 1 “Diagnostic-Output” 0 CBin latch — — PCBI in CB in — — — — PCBIin bus Syn. register Err. counter Er. type reg. 100 “Checkbit-Injection” Generate 1 SDin latch 0 Pipe. latch — — CB out — P in active Inject Checkbits 1 SD0–7 in 0 Pipe. latch — — — — — — Correct 0 Pipe. latch 1 RAM Data — CB in — — P out — 2552 tbl 06 |
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