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FT240XS-R 数据表(PDF) 12 Page - Future Technology Devices International Ltd. |
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FT240XS-R 数据表(HTML) 12 Page - Future Technology Devices International Ltd. |
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12 / 40 page ![]() Copyright © 2013 Future Technology Devices International Limited 12 FT240X USB 8-BIT FIFO IC Datasheet Version 1.3 Document No.: FT_000626 Clearance No.: FTDI# 259 3.6 FT240X FIFO READ Timing Diagrams Figure 3.3 FIFO Read Cycle Time Description Minimum Maximum Unit T1 RD# Active Pulse Width 50 - ns T2 RD# to RD# Pre-Charge Time 50 + T6 - ns T3 RD# Active to Valid Data* 20 50 ns T4 Valid Data Hold Time from RD# Inactive* 0 - ns T5 RD# Inactive to RXF# 0 25 ns T6 RXF# Inactive After RD Cycle 80 - ns Table 3.10 FIFO Read Cycle Timings *Load = 30pF RXF# RD# D[7...0] T3 T1 T5 T6 T2 T4 Valid Data |
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