AT83C51SND1C datasheet(43/47 Pages) ATMEL

Teilenummer	AT83C51SND1C

Bauteilbeschribung	Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface

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Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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AT8xC51SND1C

4106F–8051–10/02

Figure 31. AC Testing Input/Output Waveforms

Notes:

1. During AC testing, all inputs are driven at

V

DD -0.5V for a logic 1 and 0.45V for a logic 0.

2. Timing measurements are made on all outputs at VIH min for a logic 1 and VIL max for a logic 0.

Figure 32. Float Waveforms

Note:

For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs and begins to float when a

100 mV change from the loading VOH/VOL level occurs with IOL/IOH = ±20 mA.

0.45 V

DD -0.5

0.7

V

DD

0.3

VDD

VIH min

VIL max

INPUTS

OUTPUTS

VLOAD

VOH -0.1 V

VOL +0.1 V

VLOAD +0.1 V

VLOAD -0.1 V

Timing Reference Points

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