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数据搜索系统，热门电子元器件搜索 |
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PC87366 数据表(PDF) 236 Page - National Semiconductor (TI) |
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PC87366 数据表(HTML) 236 Page - National Semiconductor (TI) |
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236 / 240 page  14.0 Device Characteristics (Continued) 236 www.national.com 14.5.6 Modem Control Timing 14.5.7 FDC Write Data Timing tDRP tICP tWDW Values Symbol Parameter Min Max Unit tHL RI2,1 High to Low Transition 10 ns tLH RI2,1 Low to High Transition 10 ns tSIM Delay to Set IRQ from Modem Input 40 ns Symbol Parameter Min Max Unit tHDH HDSEL Hold from WGATE InactiveNote 1. Note 1. Not tested. Guaranteed by design. 100 µs tHDS HDSEL Setup to WGATE ActiveNote 1. 100 µs tWDW Write Data Pulse Width See tDRP,tICP and tWDW values in table below Data Rate tDRP tICP tICP Nominal tWDW tWDW Minimum Unit 1 Mbps 1000 6xtCP Note 1. Note 1. tCP is the clock period defined in the LCLK and LRESET section of this chapter. 125 2 x tICP 250 ns 500 Kbps 2000 6xtCP Note 1. 125 2 x tICP 250 ns 300 Kbps 3333 10xtCP Note 1. 208 2 x tICP 375 ns 250 Kbps 4000 12xtCP Note 1. 250 2 x tICP 500 ns CTS, DSR, DCD INTERRUPT (Read MSR) RI tSIM tSIM tSIM tHL tLH (Read MSR) tHDS tHDH tWDW HDSEL WGATE WDATA |
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