Rainbow-electronics T89C51CC02 Manual de usuario descargar pdf (Pagina 115)

Rev.A - May 17, 2001 115

Preliminary

T89C51CC02

Figure 117. ADC Description

Figure 118 shows the timing diagram of a complete conversion. For simplicity, the figure depicts the waveforms

in idealized form and do not provide precise timing information. For ADC characteristics and timing parameters

refer to the Section “AC Characteristics” of the T89C51CC02 datasheet.

Figure 118. Timing Diagram

NOTE:

Tsetup = 4 us

Tconv=11 clock ADC

AN0/P1.0

AN1/P1.1

AN2/P1.2

AN3/P1.3

AN4/P1.4

AN5/P1.5

AN6/P1.6

AN7/P1.7

000

001

010

011

100

101

110

111

SCH2

ADCON.2

SCH0

ADCON.0

SCH1

ADCON.1

ADC

CLOCK

ADEN

ADCON.5

ADSST

ADCON.3

ADEOC

ADCON.4

ADC

Interrupt

Request

EADC

IEN1.1

CONTROL

AVSS

Sample and Hold

ADDH

VAREF

R/2R DAC

VAGND

ADDL

SAR

ADCIN

ADEN

ADSST

ADEOC

SETUP

CONV

CLK

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 136 137

T89C51CC02 1

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Rainbow-electronics T89C51CC02 Manual de usuario Pagina 115

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