80C652 Datasheet, PDF(18/25 Page) NXP Semiconductors – CMOS single-chip 8-bit microcontrollers

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80C652 Datasheet, PDF (18/25 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontrollers

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Phlips Semiconductors

CMOS single-chip 8-bit microcontrollers

Product specification

80C652/83C652

VIH1

0.8V

tCHCL

tCLCX

tCHCX

tCLCH

tCLCL

Figure 6. External Clock Drive at XTAL1

VDDâ0.5

0.2VDD+0.9

0.45V

0.2VDDâ0.1

NOTE:

AC INPUTS DURING TESTING ARE DRIVEN AT VDDâ0.5 FOR A LOGIC â1â AND

0.45V FOR A LOGIC â0â. TIMING MEASUREMENTS ARE MADE AT VIH MIN FOR A

LOGIC â1â AND VIL MAX FOR A LOGIC â0â.

Figure 7. AC Testing Input/Output

VLOAD

VLOAD+0.1V

VLOADâ0.1V

TIMING

REFERENCE

POINTS

VOHâ0.1V

VOL+0.1V

NOTE:

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.

Figure 8. Float Waveform

1996 Aug 15

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