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STLC5465B 数据表(PDF) 63 Page - STMicroelectronics |
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STLC5465B 数据表(HTML) 63 Page - STMicroelectronics |
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63 / 101 page ![]() VII.6 - 68000 MOD0=0, MOD1=0, MOD2=1 Symbol Parameter Min. Typ. Max. Unit t1 Delay NDTACK / NCS0/1 (if t3 > t1), (30pF) Delay when immediate access V DD =5V V DD = 3.3V 0 0 98 108 ns ns t2 Hold Time Chip Select / NLDS-NUDS 0 ns t3 Delay NDTACK / NLDS-NUDS Falling Edge (if t1> t3), (30pF) Delay when immediate access VDD =5V VDD = 3.3V 0 0 98 108 ns ns t4 Delay NDTACK / NLDS-NUDS Rising Edge VDD =5V VDD = 3.3V 0 0 20 30 ns ns t5 Set-up Time Address and R/W / last NLDS-NUDS or NCS 0 ns t6 Hold Time Address and R/W / NLDS-NUDS 0 ns t7 Data Valid after NDTACK Falling Edge (30pF) 0 15 ns t8 Data High Impedance after NLDS-NUDS Rising Edge (30pF) 0 15 ns t7 t5 t6 t8 t3 t1 t2 t4 NCS0/1 NDTACK NAS/ ALE SIZE0/NLDS SIZE1/NUDS A1/23 R/W / NWR D0/15 A1/23 Figure 52 : 68000 Read Cycle VII - MICROPROCESSOR TIMING (continued) STLC5465B 63/101 |
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