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XR88C681CP Datasheet(PDF) 9 Page - Exar Corporation |
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XR88C681CP Datasheet(HTML) 9 Page - Exar Corporation |
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9 / 101 page  XR88C681 9 Rev. 2.11 AC ELECTRICAL CHARACTERISTICS 1, 2, 3 Test Conditions: TA = 0 - 70°C, VCC = 5V ¦ 5% unless otherwise specified. Symbol Parameter Min. Typ. Max. Unit Conditions Reset Timing (See Figure 51) tRES RESET Pulse Width 1.0 A XR88C681 Read and Write Cycle Timing (Figure 52)4 tAS A0-A3 Setup Time to RD, WR Low 10 ns tAH A0-A3 Hold Time from RD, WR Low 0 ns tCS CS Setup Time to RD, WR Low 0 ns tCH CS Hold Time from -RD, -WR High 0 ns tRW -RD, -WR Pulse Width 225 ns tDD Data Valid from -RD Low 60 175 ns tDF Data Bus Floating from -RD High 10 100 ns tDS Data Setup Time to -WR High 100 ns tDH Data Hold Time from -WR High 5 ns tRWD High Time Between Reads and/or Writes5, 6 100 ns Z-Mode Interrupt Cycle Timing (Figure 53) tDIO IEO Delay Time from IEI 100 ns tIAS -IACK Setup Time to -RD Low7 ns tIAH -IACK Hold Time from -RD High 0 ns tEIS IEI Setup Time to RD Low 50 ns tEOD IEO Delay Time from -INTR Low 100 ns Port Timing (Figure 54)4 tPS Port Input Setup Time to -RD/-CS Low 0 ns tPH Port Input Hold Time from -RD/-CS High 0 ns tPD Port Output Valid from -WR/-CS High 400 ns Interrupt Output Timing (Figure 55) tIR -INTR or OP3 - OP7 when used as Interrupts High from: Clear of Interrupts Status Bits in ISR or IPCR Clear of Interrupt Mask in IMR 300 300 ns ns Clock Timing (Figure 56) |
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