Datasheet
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
DS70591E-page 310 2009-2012 Microchip Technology Inc.
22.3 Module Functionality
The High-Speed, 10-Bit ADC is designed to support
power conversion applications when used with the
High-Speed PWM module. The ADC may have one or
two SAR modules, depending on the device variant. If
two SARs are present on a device, two conversions
can be processed at a time, yielding 4 Msps conversion
rate. If only one SAR is present on a device, only one
conversion can be processed at a time, yielding 2 Msps
conversion rate. The High-Speed, 10-Bit ADC produces
two 10-bit conversion results in a 0.5 microsecond.
The ADC module supports up to 24 external analog
inputs and two internal analog inputs. To monitor
reference voltage, two internal inputs, AN24 and AN25,
are connected to EXTREF and INTREF, respectively.
The analog reference voltage is defined as the device
supply voltage (AV
DD/AVSS).
The ADC module uses the following control and status
registers:
• ADCON: ADC Control Register
• ADSTAT: ADC Status Register
• ADBASE: ADC Base Register
(1,2)
• ADPCFG: ADC Port Configuration Register
• ADPCFG2: ADC Port Configuration Register 2
• ADCPC0: ADC Convert Pair Control Register 0
• ADCPC1: ADC Convert Pair Control Register 1
• ADCPC2: ADC Convert Pair Control Register 2
• ADCPC3: ADC Convert Pair Control Register 3
• ADCPC4: ADC Convert Pair Control Register 4
• ADCPC5: ADC Convert Pair Control Register 5
• ADCPC6: ADC Convert Pair Control Register 6(2)
The ADCON register controls the operation of the
ADC module. The ADSTAT register displays the
status of the conversion processes. The ADPCFG
registers configure the port pins as analog inputs or
as digital I/O. The ADCPCx registers control the
triggering of the ADC conversions. See Register 22-1
through Register 22-12 for detailed bit configurations.
Note: A unique feature of the ADC module is its
ability to sample inputs in an asynchro-
nous manner. Individual sample and hold
circuits can be triggered independently of
each other.