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FT240XS-R 数据表(PDF) 13 Page - Future Technology Devices International Ltd. |
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FT240XS-R 数据表(HTML) 13 Page - Future Technology Devices International Ltd. |
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13 / 40 page ![]() Copyright © 2013 Future Technology Devices International Limited 13 FT240X USB 8-BIT FIFO IC Datasheet Version 1.3 Document No.: FT_000626 Clearance No.: FTDI# 259 3.7 FT240X FIFO WRITE Timing Diagrams Figure 3.4 FIFO Write Cycle Time Description Minimum Maximum Unit T7 WR Active Pulse Width 50 - ns T8 WR to WR Pre-Charge Time 50 - ns T9 Valid data setup to WR falling edge* 20 - ns T10 Valid Data Hold Time from WR Inactive* 0 - ns T11 WR Inactive to TXE# 5 25 ns T12 TXE# Inactive After WR Cycle 80 - ns Table 3.11 FIFO Write Cycle *Load = 30pF Valid Data D[7...0] WR TXE# T7 T12 T11 T8 T9 T10 |
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