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AT89C51CC03U-RDTIM датащи(PDF) 155 Page - ATMEL Corporation

номер детали AT89C51CC03U-RDTIM
подробное описание детали  Enhanced 8-bit MCU with CAN Controller and Flash Memory
PDF  195 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51CC03U-RDTIM датащи(HTML) 155 Page - ATMEL Corporation

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AT89C51CC03
4182I–CAN–06/05
Figure 75. A/D Converter Clock
ADC Standby Mode
When the ADC is not used, it is possible to set it in standby mode by clearing bit ADEN
in ADCON register. In this mode its power dissipation is about 1 µW.
IT ADC Management
An interrupt end-of-conversion will occurs when the bit ADEOC is activated and the bit
EADC is set. For re-arming the interrupt the bit ADEOC must be cleared by software.
Figure 76. ADC Interrupt Structure
Routines examples
1. Configure P1.2 and P1.3 in ADC channels
// configure channel P1.2 and P1.3 for ADC
ADCF = 0Ch
// Enable the ADC
ADCON = 20h
2. Start a standard conversion
// The variable "channel" contains the channel to convert
// The variable "value_converted" is an unsigned int
// Clear the field SCH[2:0]
ADCON and = F8h
// Select channel
ADCON | = channel
// Start conversion in standard mode
ADCON | = 08h
// Wait flag End of conversion
while((ADCON and 01h)! = 01h)
// Clear the End of conversion flag
ADCON and = EFh
// read the value
value_converted = (ADDH << 2)+(ADDL)
3. Start a precision conversion (need interrupt ADC)
// The variable "channel" contains the channel to convert
// Enable ADC
Prescaler ADCLK
A/D
Converter
ADC Clock
CPU
CLOCK
CPU Core Clock Symbol
÷ 2
ADEOC
ADCON.2
EADC
IEN1.1
ADCI



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