83C552 Datasheet, PDF(18/24 Page) NXP Semiconductors – Single-chip 8-bit microcontroller

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83C552 Datasheet, PDF (18/24 Pages) NXP Semiconductors – Single-chip 8-bit microcontroller

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Philips Semiconductors

Single-chip 8-bit microcontroller

Product specification

80C552/83C552

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

START or repeated START condition

tRD

SDA

(INPUT/OUTPUT)

tFD

tRC

tFC

SCL

(INPUT/OUTPUT)

tHD;STA tLOW

tHIGH

tSU;DAT1

tHD;DAT

repeated START condition

STOP condition

tSU;STA

START condition

tBUF

tSU;STO

0.7 VCC

0.3 VCC

tSU;DAT3

tSU;DAT2

0.7 VCC

0.3 VCC

Figure 9. Timing SIO1 (I2C) Interface

1998 Aug 13

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