P83C453EBAA datasheet(19/23 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

80C453/83C453/87C453

CMOS single-chip 8-bit microcontrollers

1996 Aug 15

3-329

VCC–0.5

0.45V

0.7VCC

0.2VCC–0.1

tCHCL

tCLCL

tCLCH

tCLCX

tCHCX

SU00009

Figure 17. External Clock Drive

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 18. 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 19. Float Waveform

4MHz

8MHz

12MHz

16MHz

FREQ AT XTAL1

MAX ACTIVE MODE

TYP ACTIVE MODE

MAX IDLE MODE

TYP IDLE MODE

ICC mA

VALID ONLY WITHIN FREQUENCY SPECIFICATIONS OF THE DEVICE UNDER TEST.

SU00092

Figure 20. ICC vs. FREQ

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