907
SAM4CP [DATASHEET]
43051E–ATPL–08/14
40.5.3 Analog Inputs
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 Channel Enable register (ADC_CHER). By default,
after reset, the PIO line is configured as a digital input with its pull-up enabled and the ADC input is connected to the
GND.
40.5.4 Temperature Sensor
The temperature sensor is internally connected to channel index 7 of the ADC.
The temperature sensor provides an output voltage V
T
that is proportional to the absolute temperature (PTAT). To
activate the temperature sensor, the TEMPON bit in the Temperature Sensor Mode register (ADC_TEMPMR) must be
set. After setting the bit, the startup time of the temperature sensor must be achieved prior to initiating any measurement.
40.5.5 I/O Lines
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.
40.5.6 Timer Triggers
Timer Counters may or may not be used as hardware triggers depending on user requirements. Thus, some or all of the
timer counters may be unconnected.
40.5.7 Conversion Performances
For performance and electrical characteristics of the ADC, see the Electrical Characteristics.
Table 40-2. Peripheral IDs
Instance
ID
ADC
29
Table 40-3. I/O Lines
Instance
Signal
I/O Line
Peripheral
ADC
ADTRG
PB23
A
ADC
COM4/AD1
PA4
X1
ADC
SEG6/AD0
PA12
X1
ADC
SEG31/AD3
PB13
X1
ADC
SEG41/AD4
PB23
X1
ADC
SEG49/AD5
PB31
X1