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IDT7207L50LB Datasheet(PDF) 10 Page - Integrated Device Technology |
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IDT7207L50LB Datasheet(HTML) 10 Page - Integrated Device Technology |
10 / 12 page 5.05 10 IDT7207 CMOS ASYNCHRONOUS FIFO 32,768 x 9 MILITARY AND COMMERCIAL TEMPERATURE RANGES TRUTH TABLES TABLE I – RESET AND RETRANSMIT SINGLE DEVICE CONFIGURATION/WIDTH EXPANSION MODE Inputs Internal Status Outputs Mode RS RS RT RT XI XI Read Pointer Write Pointer EF EF FF FF HF HF Reset 0 X 0 Location Zero Location Zero 0 1 1 Retransmit 1 0 0 Location Zero Unchanged X X X Read/Write 1 1 0 Increment (1) Increment (1) XX X TABLE II – RESET AND FIRST LOAD DEPTH EXPANSION/COMPOUND EXPANSION MODE Inputs Internal Status Outputs Mode RS RS FL FL XI XI Read Pointer Write Pointer EF EF FF FF Reset First Device 0 0 (1) Location Zero Location Zero 0 1 Reset all Other Devices 0 1 (1) Location Zero Location Zero 0 1 Read/Write 1 X (1) X X X X Figure 14. Block Diagram of 98,304 x 9 FIFO Memory (Depth Expansion) NOTES: 3140 tbl 10 1. XI is connected to XO of previous device. See Figure 14. 2. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output, XI = Expansion Input, HF = Half-Full Flag Output NOTE: 3140 tbl 09 1. Pointer will Increment if flag is HIGH. D W IDT 7207 FF EF FL XO RS FULL EMPTY VCC R 9 9 99 XI 9 Q FF EF FL XO XI FF EF FL XO XI IDT 7207 IDT 7207 3140 drw 17 |
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