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89C52 Datasheet(PDF) 25 Page - NXP Semiconductors |
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89C52 Datasheet(HTML) 25 Page - NXP Semiconductors |
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25 / 32 page  Philips Semiconductors Product specification 89C51/89C52/89C54/89C58 80C51 8-bit microcontroller family 4K/8K/16K/32K Flash 1999 Oct 27 25 VCC–0.5 0.45V 0.2VCC+0.9 0.2VCC–0.1 NOTE: AC inputs during testing are driven at VCC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’. Timing measurements are made at VIH min for a logic ‘1’ and VIL max for a logic ‘0’. SU00717 Figure 19. AC Testing Input/Output VLOAD VLOAD+0.1V VLOAD–0.1V VOH–0.1V VOL+0.1V NOTE: TIMING REFERENCE POINTS For timing purposes, a port is no longer floating when a 100mV change from load voltage occurs, and begins to float when a 100mV change from the loaded VOH/VOL level occurs. IOH/IOL ≥ ±20mA. SU00718 Figure 20. Float Waveform 4 8 12 16 20 24 28 32 36 60 50 40 30 20 10 Frequency at XTAL1 (MHz) ICC (mA) SU01056 Icc IDLE MODE (TYP.) Icc MAX ACTIVE MODE (TYP.) Icc MAX. ACTIVE MODE Icc MAX. IDLE MODE Figure 21. ICC vs. FREQ Valid only within frequency specifications of the device under test |
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