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FT221XS-R 数据表(PDF) 19 Page - Future Technology Devices International Ltd. |
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FT221XS-R 数据表(HTML) 19 Page - Future Technology Devices International Ltd. |
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19 / 45 page ![]() Copyright © 2013 Future Technology Devices International Limited 19 FT221X USB 8-BIT SPI/FT1248 IC Datasheet Version 1.3 Document No.: FT_000630 Clearance No.: FTDI# 263 T5 22 MIOSIO setup time to rising or falling sample SCLK edge T6 1 MIOSIO hold time from rising or falling sample SCLK edge T7 5 SS_n setup time to rising or falling SCLK edge T8 5 SS_n hold time from rising or falling sample SCLK edge Table 5.4: 2V5 VCCIO timings Min (ns) Typical (ns) Max (ns) Description T1 83.33ns SCLK Period T2 41.67ns SCLK HIGH T3 41.67ns SCLK LOW T4 1 10 SCLK rising or falling driving edge to MIOSIO/MSIO T5 20 MIOSIO setup time to rising or falling sample SCLK edge T6 0 MIOSIO hold time from rising or falling sample SCLK edge T7 5 SS_n setup time to rising or falling SCLK edge T8 5 SS_n hold time from rising or falling sample SCLK edge Table 5.5: 3V3 VCCIO timings |
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