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FT313HP-R 数据表(PDF) 46 Page - Future Technology Devices International Ltd. |
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FT313HP-R 数据表(HTML) 46 Page - Future Technology Devices International Ltd. |
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46 / 67 page ![]() Copyright © 2013 Future Technology Devices International Limited 46 Document No.: FT_000589 FT313H USB2.0 HS Host Controller Datasheet Version 1.2 Clearance No.: FTDI# 318 6.4 Timing 6.4.1 PIO timing SRAM PIO timing characteristics (Ambient Temperature = -40°C to +85°C) Parameter Description VCC(I/O)=1.8V VCC(I/O)=2.5V VCC(I/O)=3.3V Unit Min Max Min Max Min Max Tcs CS_N setup time before WR_N / RD_N low 0 - 0 - 0 - ns Tch CS_N hold time after WR_N / RD_N high 0 - 0 - 0 - ns Tcp CS_N pulse width for read 40 - 40 - 40 - ns CS_N pulse width for write 40 - 40 - 40 - ns Tasrw address setup time before WR_N / RD_N low 0 - 0 - 0 - ns Tahrw Address Hold Time after WR_N/RD_N LOW 0 - 0 - 0 - ns Tap Address Latch Pulse Width ns Twc Write Cycle Time 80 - 79 - 78.5 - ns Twp WR_N Pulse Width 40 - 40 - 40 - ns Tdh RD_N High to Output Hi-Z 4 9 4 7 4 6 ns WR_N High to Input Hi-Z 0 - 0 - 0 - ns Tdadvh DATA Setup Time before DATA Latch 6 - 6 - 6 - ns Toe RD_N Low to DATA Output Enable 8 - 7 - 6 - ns Trp RD_N Pulse Width 40 - 40 - 40 - ns Trc Read Cycle Time 80 - 79.5 - 79 - ns Table 6-10 SRAM PIO timing |
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