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ATSAM4S-XPLD
983
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
41.5.3 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 register 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.
done as soon as the corresponding channel is enabled by writing the register 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.
41.5.4 Temperature Sensor
The temperature sensor is internally connected to channel 15 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, TSON bit (ADC_ACR) needs to be set. After being set, the startup time of the
temperature sensor must be achieved prior to initiating any measure.
temperature sensor must be achieved prior to initiating any measure.
41.5.5 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.
Controller should be set accordingly to assign the pin ADTRG to the ADC function.
41.5.6 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.
timer counters may be unconnected.
41.5.7 PWM Event Line
PWM Event Lines may or may not be used as hardware triggers depending on user requirements.
Table 41-3. I/O Lines
Instance
Signal
I/O Line
Peripheral
ADC
ADTRG
PA8
B
ADC
AD0
PA17
X1
ADC
AD1
PA18
X1
ADC
AD2/WKUP9
PA19
X1
ADC
AD3/WKUP10
PA20
X1
ADC
AD4/RTCOUT0
PB0
X1
ADC
AD5/RTCOUT1
PB1
X1
ADC
AD6/WKUP12
PB2
X1
ADC
AD7
PB3
X1
ADC
AD8
PA21
X1
ADC
AD9
PA22
X1
ADC
AD10
PC13
X1
ADC
AD11
PC15
X1
ADC
AD12
PC12
X1
ADC
AD13
PC29
X1
ADC
AD14
PC30
X1