Datasheet

927
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
42.5 Product Dependencies
42.5.1 Power Management
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.
42.5.2 Interrupt Sources
The ADC interrupt line is connected on one of the internal sources of the Interrupt Controller. Using the ADC interrupt
requires the interrupt controller to be programmed first.
42.5.3 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.
42.5.4 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.
42.5.5 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.
42.5.6 Conversion Performances
For performance and electrical characteristics of the ADC, see the product DC Characteristics section.
Table 42-2. Peripheral IDs
Instance ID
ADC 19
Table 42-3. I/O Lines
Instance Signal I/O Line Peripheral
ADC ADTRG PB18 B
ADC AD0 PB11 X1
ADC AD1 PB12 X1
ADC AD2 PB13 X1
ADC AD3 PB14 X1
ADC AD4 PB15 X1
ADC AD5 PB16 X1
ADC AD6 PB17 X1
ADC AD7 PB6 X1
ADC AD8 PB7 X1
ADC AD9 PB8 X1
ADC AD10 PB9 X1
ADC AD11 PB10 X1