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72V245L20TFGI Datasheet(PDF) 8 Page - Integrated Device Technology |
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72V245L20TFGI Datasheet(HTML) 8 Page - Integrated Device Technology |
8 / 25 page 8 IDT72V205/72V215/72V225/72V235/72V245 3.3V CMOS SyncFIFOTM 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18 COMMERCIALANDINDUSTRIAL TEMPERATURERANGES MARCH 2013 NOTES: 1. In a daisy-chain depth expansion, FL is held LOW for the "first load device". The RXI and WXI inputs are driven by the corresponding RXO and WXO outputs of the preceding device. 2. In a daisy-chain depth expansion, FL is held HIGH for members of the expansion other than the "first load device". The RXI and WXI inputs are driven by the corresponding RXO and WXO outputs of the preceding device. TABLE 3 — TRUTH TABLE FOR CONFIGURATION AT RESET FL RXI WXI EF/OR FF/IR PAE, PAF FIFO Timing Mode 0 0 0 Singleregister-buffered Singleregister-buffered Asynchronous Standard EmptyFlag Full Flag 0 0 1 Tripleregister-buffered Doubleregister-buffered Asynchronous FWFT Output Ready Flag Input Ready Flag 0 1 0 Doubleregister-buffered Doubleregister-buffered Asynchronous Standard EmptyFlag Full Flag 0(1) 1 1 Singleregister-buffered Singleregister-buffered Asynchronous Standard EmptyFlag Full Flag 1 0 0 Singleregister-buffered Singleregister-buffered Synchronous Standard EmptyFlag Full Flag 1 0 1 Tripleregister-buffered Doubleregister-buffered Synchronous FWFT Output Ready Flag Input Ready Flag 1 1 0 Doubleregister-buffered Doubleregister-buffered Synchronous Standard EmptyFlag Full Flag 1(2) 1 1 Singleregister-buffered Singleregister-buffered Synchronous Standard EmptyFlag Full Flag TABLE 4 — REGISTER-BUFFERED FLAG OUTPUT OPTIONS — IDT STANDARD MODE Empty Flag (EF) Full Flag (FF) Partial Flags Programming at Reset Flag Timing Buffered Output Buffered Output Timing Mode FL RXI WXI Diagrams Single Single Asynch 0 0 0 Figure 9, 10 Single Single Sync 1 0 0 Figure 9, 10 Double Double Asynch 0 1 0 Figure 24, 26 Double Double Synch 1 1 0 Figure 24, 26 TABLE 5 — REGISTER-BUFFERED FLAG OUTPUT OPTIONS — FWFT MODE Output Ready (OR) Input Ready (IR) Partial Flags Programming at Reset Flag Timing FL RXI WXI Diagrams Triple Double Asynch 0 0 1 Figure 27 Triple Double Sync 1 0 1 Figure 20, 21 |
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