P83C654FBA datasheet(18/28 Pages) PHILIPS

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Philips Semiconductors

Product specification

87C654

CMOS single-chip 8-bit microcontroller

1996 Aug 16

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’.

SU00010

Figure 6. 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.

SU00011

Figure 7. Float Waveform

VCC

RST

XTAL1

XTAL2

VSS

VCC

ICC

(NC)

CLOCK SIGNAL

P1.6

P1.7

87C654

SU00272

Figure 8. ICC Test Condition, Active Mode

All other pins are disconnected

NOTE:

Ports 1.6 and 1.7 should be connected to VCC through resistors of sufficiently high value such that the sink current into these pins does not

exceed the IOL1 specification.

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