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28C64AFT-20VS Datasheet(PDF) 5 Page - Microchip Technology |
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28C64AFT-20VS Datasheet(HTML) 5 Page - Microchip Technology |
5 / 8 page © 1996 Microchip Technology Inc. DS11109H-page 5 28C64A FIGURE 1-3: DATA POLLING WAVEFORMS FIGURE 1-4: CHIP CLEAR WAVEFORMS TABLE 1-5: SUPPLEMENTARY CONTROL Mode CE OE WE A9 VCC I/OI Chip Clear VIL VIH VIL XVCC Extra Row Read VIL VIL VIH A9 = VH VCC Data Out Extra Row Write * VIH * A9 = VH VCC Data In Note: VH = 12.0V ±0.5V. *Pulsed per programming waveforms. Address Valid Last Written Address Valid t ACC t CE t WPL t WPH t DV t WC t OE True Data Out Data In Valid VIH VIL Data OE WE CE Address I/O7 Out VIH VIL VIH VIL VIH VIL VIH VIL VH VIH CE OE WE tS tH tW tS = = 1 µs tH = 10ms tW VIH VIL VIH VIL = 12.0V ±0.5V VH |
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