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PSD813F2 数据表(PDF) 106 Page - STMicroelectronics |
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PSD813F2 数据表(HTML) 106 Page - STMicroelectronics |
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106 / 128 page  AC/DC parameters PSD8XXFX 106/128 Doc ID 7833 Rev 7 Figure 44. READ timing 1. tAVLX and tLXAX are not required for 80C251 in Page mode or 80C51XA in Burst mode. tAVLX tLXAX 1 tLVLX tAVQV tSLQV tRLQV tRHQX tRHQZ tELTL tEHEL tRLRH tTHEH tAVPV ADDRESS VALID ADDRESS VALID DATA VALID DATA VALID ADDRESS OUT ALE /AS A/D MULTIPLEXED BUS ADDRESS NON-MULTIPLEXED BUS DATA NON-MULTIPLEXED BUS CSI RD (PSEN, DS) E R/W AI02895 Table 56. READ timing (5 V devices) Symbol Parameter Conditions -70 -90 -15 Turbo off Unit Min Max Min Max Min Max tLVLX ALE or AS pulse width 15 20 28 ns tAVLX Address setup time (1) 4 6 10 ns tLXAX Address hold time (1) 7 8 11 ns tAVQV Address valid to data valid (1) 70 90 150 + 10 ns tSLQV CS valid to data valid 75 100 150 ns tRLQV RD to data valid 8-bit bus (2) 24 32 40 ns RD or PSEN to data valid 8-bit bus, 8031, 80251 (3) 31 38 45 ns tRHQX RD data hold time (4) 00 0 ns tRLRH RD pulse width (4) 27 32 38 ns tRHQZ RD to data high-Z (4) 20 25 30 ns tEHEL E pulse width 27 32 38 ns Obsolete Product(s) - Obsolete Product(s) |
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