at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 106
at89c51ac3-s3sim
Manufacturer Part Number
at89c51ac3-s3sim
Description
At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51AC3-S3SIM.pdf
(140 pages)
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Figure 59. ADC Description
Figure 60. Timing Diagram
Note:
106
Tsetup min = 4 us
Tconv=11 clock ADC = 1sample and hold + 10 bit conversion
The user must ensure that 4 us minimum time between setting ADEN and the start of the first conversion.
AN0/P1.0
AN1/P1.1
AN2/P1.2
AN3/P1.3
AN4/P1.4
AN5/P1.5
AN6/P1.6
AN7/P1.7
AT89C51AC3
ADEOC
ADSST
ADEN
CLOCK
CLK
ADC
ADCON.2
SCH2
000
001
010
011
100
101
110
111
T
SETUP
ADCON.1
SCH1
Figure 60 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 AT89C51AC3 datasheet.
ADCON.5
Sample and Hold
ADEN
CONTROL
ADCON.0
SCH0
AVSS
ADCON.3
ADSST
ADCIN
+
-
T
CONV
VAREF
ADCON.4
ADEOC
R/2R DAC
VAGND
SAR
EADC
IEN1.1
10
8
2
ADDH
ADDL
ADC
Interrupt
Request
4383D–8051–02/08
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