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MSC1212Y4PAGR Datasheet(PDF) 9 Page - Texas Instruments |
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MSC1212Y4PAGR Datasheet(HTML) 9 Page - Texas Instruments |
9 / 105 page MSC1211, MSC1212 MSC1213,MSC1214 SBAS323D − JUNE 2004 − REVISED SEPTEMBER 2005 www.ti.com 9 AC ELECTRICAL CHARACTERISTICS(1)(2): DVDD = 2.7V to 5.25V 2.7V to 3.6V 4.75V to 5.25V SYMBOL FIGURE PARAMETER MIN MAX MIN MAX UNITS System Clock fOSC(3) 4 External Crystal Frequency (fOSC) 1 24 1 33 MHz 1/tOSC(3) 4 External Clock Frequency (fOSC) at +85°C 0 24 0 40 MHz 1/tOSC(3) 4 External Clock Frequency (fOSC) at +125°C 0 22 0 36 MHz fOSC(3) 4 External Ceramic Resonator Frequency (fOSC) 1 12 1 12 MHz Program Memory tLHLL 1 ALE Pulse Width 1.5tCLK − 5 1.5tCLK − 5 ns tAVLL 1 Address Valid to ALE Low 0.5tCLK − 10 0.5tCLK − 7 ns tLLAX 1 Address Hold After ALE Low 0.5tCLK 0.5tCLK ns tLLIV 1 ALE Low to Valid Instruction In 2.5tCLK − 35 2.5tCLK − 25 ns tLLPL 1 ALE Low to PSEN Low 0.5tCLK 0.5tCLK ns tPLPH 1 PSEN Pulse Width 2tCLK − 5 2tCLK − 5 ns tPLIV 1 PSEN Low to Valid Instruction In 2tCLK − 40 2tCLK − 30 ns tPXIX 1 Input Instruction Hold After PSEN 5 −5 ns tPXIZ 1 Input Instruction Float After PSEN tCLK − 5 tCLK ns tAVIV 1 Address to Valid Instruction In 3tCLK − 40 3tCLK − 25 ns tPLAZ 1 PSEN Low to Address Float 0 0 ns Data Memory tRLRH 2 RD Pulse Width (tMCS = 0)(4) 2tCLK − 5 2tCLK − 5 ns tRLRH 2 RD Pulse Width (tMCS > 0)(4) tMCS − 5 tMCS − 5 ns tWLWH 3 WR Pulse Width (tMCS = 0)(4) 2tCLK − 5 2tCLK − 5 ns tWLWH 3 WR Pulse Width (tMCS > 0)(4) tMCS − 5 tMCS − 5 ns tRLDV 2 RD Low to Valid Data In (tMCS = 0)(4) 2tCLK − 40 2tCLK − 30 ns tRLDV 2 RD Low to Valid Data In (tMCS > 0)(4) tMCS − 40 tMCS − 30 ns tRHDX 2 Data Hold After Read −5 −5 ns tRHDZ 2 Data Float After Read (tMCS = 0)(4) tCLK tCLK ns tRHDZ 2 Data Float After Read (tMCS > 0)(4) 2tCLK 2tCLK ns tLLDV 2 ALE Low to Valid Data In (tMCS = 0)(4) 2.5tCLK − 40 2.5tCLK − 25 ns tLLDV 2 ALE Low to Valid Data In (tMCS > 0)(4) tCLK + tMCS − 40 tCLK + tMCS − 25 ns tAVDV 2 Address to Valid Data In (tMCS = 0)(4) 3tCLK − 40 3tCLK − 25 ns tAVDV 2 Address to Valid Data In (tMCS > 0)(4) 1.5tCLK +tMCS −40 1.5tCLK +tMCS −25 ns tLLWL 2, 3 ALE Low to RD or WR Low (tMCS = 0)(4) 0.5tCLK − 5 0.5tCLK + 5 0.5tCLK − 5 0.5tCLK + 5 ns tLLWL 2, 3 ALE Low to RD or WR Low (tMCS > 0)(4) tCLK − 5 tCLK + 5 tCLK − 5 tCLK + 5 ns tAVWL 2, 3 Address to RD or WR Low (tMCS = 0)(4) tCLK − 5 tCLK − 5 ns tAVWL 2, 3 Address to RD or WR Low (tMCS > 0)(4) 2tCLK − 5 2tCLK − 5 ns tQVWX 3 Data Valid to WR Transition −8 −5 ns tWHQX 3 Data Hold After WR tCLK − 8 tCLK − 5 ns tRLAZ 2 RD Low to Address Float −0.5tCLK − 5 −0.5tCLK − 5 ns tWHLH 2, 3 RD or WR High to ALE High (tMCS = 0)(4) −5 5 −5 5 ns tWHLH 2, 3 RD or WR High to ALE High (tMCS > 0)(4) tCLK − 5 tCLK + 5 tCLK − 5 tCLK + 5 ns External Clock tHIGH 4 High Time(5) 15 10 ns tLOW 4 Low Time(5) 15 10 ns tR 4 Rise Time(5) 5 5 ns tF 4 Fall Time(5) 5 5 ns (1) Parameters are valid over operating temperature range, unless otherwise specified. (2) Load capacitance for Port 0, ALE, and PSEN = 100pF; load capacitance for all other outputs = 80pF. (3) t CLK = 1/f OSC = one oscillator clock period for clock divider = 1. (4) t MCS is a time period related to the Stretch MOVX selection. The following table shows the value of t MCS for each stretch selection: (5) These values are characterized, but not 100% production tested. MD2 MD1 MD0 MOVX DURATION tMCS 0 0 0 2 Machine Cycles 0 0 0 1 3 Machine Cycles (default) 4tCLK 0 1 0 4 Machine Cycles 8tCLK 0 1 1 5 Machine Cycles 12tCLK 1 0 0 6 Machine Cycles 16tCLK 1 0 1 7 Machine Cycles 20tCLK 1 1 0 8 Machine Cycles 24tCLK 1 1 1 9 Machine Cycles 28tCLK |
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