SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1329

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

43.5
43.5.1
43.5.2
43.5.3
43.5.4
43.5.5
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Product Dependencies
Power Management
Interrupt Sources
Analog Inputs
Temperature Sensor
I/O Lines
The ADC Controller is not continuously clocked. The programmer must first enable the ADC
Controller MCK in the Power Management Controller (PMC) before using the ADC Controller.
However, if the application does not require ADC operations, the ADC Controller clock can be
stopped when not needed and restarted when necessary. Configuring the ADC Controller does
not require the ADC Controller clock to be enabled.
The ADC interrupt line is connected on one of the internal sources of the Interrupt Controller.
Using the ADC interrupt requires the NVIC to be programmed first.
Table 43-2.
The analog input pins can be multiplexed with PIO lines. In this case, the assignment of the ADC
input is automatically done as soon as the corresponding channel is enabled by writing the reg-
ister ADC_CHER. By default, after reset, the PIO line is configured as input with its pull-up
enabled and the ADC input is connected to the GND.
The temperature sensor is connected to Channel 15 of the ADC.
The temperature sensor provides an output voltage V
ture (PTAT). To activate the temperature sensor, TSON bit (ADC_ACR) needs to be set.
The pin ADTRG may be shared with other peripheral functions through the PIO Controller. In
this case, the PIO Controller should be set accordingly to assign the pin ADTRG to the ADC
function.
Table 43-3.
Instance
Instance
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
ADC
Peripheral IDs
I/O Lines
37
ID
AD1/WKUP1
ADTRG
Signal
AD0
AD2
AD3
AD4
AD5
AD6
AD7
AD8
T
that is proportional to absolute tempera-
I/O Line
PB12
PA11
PA22
PA23
PA24
PA16
PA2
PA3
PA4
PA6
Peripheral
SAM3X/A
SAM3X/A
X1
X1
X1
X1
X1
X1
X1
X1
X1
B
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