AT89C51CC03C-S3RIM Atmel, AT89C51CC03C-S3RIM Datasheet - Page 149

• Manufacturer Part Number: AT89C51CC03C-S3RIM
• Description: IC 8051 MCU FLASH 64K 52PLCC
• Manufacturer: Atmel
• Series: AT89C CANr

Specifications of AT89C51CC03C-S3RIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: AT89C51CC03CS3RTR

IT ADC Management
Routines examples
4182E–CAN–05/04
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 72. ADC Interrupt Structure
1. Configure P1.2 and P1.3 in ADC channels
2. Start a standard conversion
3. Start a precision conversion (need interrupt ADC)
Note:
// configure channel P1.2 and P1.3 for ADC
// Enable the ADC
// The variable "channel" contains the channel to convert
// The variable "value_converted" is an unsigned int
// Clear the field SCH[2:0]
// Select channel
// Start conversion in standard mode
// Wait flag End of conversion
// Clear the End of conversion flag
// read the value
// The variable "channel" contains the channel to convert
// Enable ADC
// clear the field SCH[2:0]
// Select the channel
// Start conversion in precision mode
ADCF = 0Ch
ADCON = 20h
ADCON and = F8h
ADCON | = channel
ADCON | = 08h
while((ADCON and 01h)! = 01h)
ADCON and = EFh
value_converted = (ADDH << 2)+(ADDL)
EADC = 1
ADCON and = F8h
ADCON | = channel
ADCON | = 48h
to enable the ADC interrupt:
EA = 1
ADEOC
ADCON.2
EADC
IEN1.1
AT89C51CC03
ADCI
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