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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC87306 데이터시트(PDF) 95 Page - National Semiconductor (TI) |
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PC87306 데이터시트(HTML) 95 Page - National Semiconductor (TI) |
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95 / 110 page  120 Electrical Characteristics (Continued) 1222 Clock Timing Symbol Parameter Min Max Units tCH Clock High Pulse Width 16 ns tCL Clock Low Pulse Width 16 ns tCP Clock Period 40 43 ns tICP Internal Clock Period (Table 12-1) ns tDRP Data Rate Period (Table 12-1) ns TABLE 12-1 Nominal tICP tDRP Values MFM Data Rate tDRP tICP Value Units 1 Mbps 1000 3 x tCP 125 ns 500 kbps 2000 3 x tCP 125 ns 300 kbps 3333 5 x tCP 208 ns 250 kbps 4000 6 x tCP 250 ns TLC12379 – 68 FIGURE 12-1 Clock Timing 1223 Microprocessor Interface Timing Symbol Parameter Min Max Units tAR Valid Address to Read Active 18 ns tAW Valid Address to Write Active 18 ns tDH Data Hold 0 ns tDS Data Setup 18 ns tHZ Read to Floating Data Bus 13 25 ns tPS Port Setup 10 ns tRA Address Hold from Inactive Read 0 ns tRCU Read Cycle Update 45 ns tRD Read Strobe Width 60 ns tRDH Read Data Hold 10 ns tRI Read Strobe to Clear IRQ6 55 ns tRVD Active Read to Valid Data 55 ns tWA Address Hold from Inactive Write 0 ns tWCU Write Cycle Update 45 ns tWI Write Strobe to Clear IRQ6 55 ns tWO Write Data to Port Update 60 ns tWR Write Strobe Width 60 ns RC Read Cycle e tAR a tRD a tRCU 123 ns WC Write Cycle e tAW a tWR a tWCU 123 ns tWRR RD Low after WR High 80 ns 95 |
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