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IDT7283L Datasheet(PDF) 9 Page - Integrated Device Technology |
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IDT7283L Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 12 page 9 COMMERCIALTEMPERATURERANGE IDT7280/7281/7282/7283/7284/7285 5V ASYNCHRONOUS FIFO DUAL 256 x 9, 512 x 9, 1,024 x 9, 2,048 x 9, 4,096 x 9 and 8,192 x 9 Figure 14. Block Diagram of 1,024 x 9, 2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 FIFO Memory (Depth Expansion) TABLE 1 — RESET AND RETRANSMIT Single Device Configuration/Width Expansion Mode Inputs Internal Status Outputs Mode RS RT XI Read Pointer Write Pointer EF FF HF Reset 0 X 0 LocationZero LocationZero 0 1 1 Retransmit 1 0 0 LocationZero Unchanged X X X Read/Write 1 1 0 Increment (1) Increment (1) XXX NOTE: 1. Pointer will increment if flag is High. TABLE 2 — RESET AND FIRST LOAD TRUTH TABLE Depth Expansion/Compound Expansion Mode Inputs Internal Status Outputs Mode RS FL XI Read Pointer Write Pointer EF FF Reset First Device 0 0 (1) LocationZero LocationZero 0 1 Reset All Other Devices 0 1 (1) LocationZero LocationZero 0 1 Read/Write 1 X (1) X X X X NOTE: 10 1. XI is connected to XO of previous device. See Figure 14. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output, XI = Expansion Input, HF = Half-Full Flag Output D W FFB EFB FLB XOB RSA FULL EMPTY V CC R 9 9 99 XIB 9 Q FFA EFA FLA XOA XIA FFB EFB FLB XIB 3208 drw 16 XOA FIFO A FIFO B FIFO A FIFO B XIA XOB EFA FLA FFA 7280/7281/ 7282/7283/ 7284/7285 7280/7281/ 7282/7283/ 7284/7285 |
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