Datasheet

1044
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
42.5.6 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.
42.5.7 PWM Event Line
PWM Event Lines may or may not be used as hardware triggers depending on user requirements.
42.5.8 Fault Output
The ADC Controller has the FAULT output connected to the FAULT input of PWM. Please refer to Section 42.6.13
”Fault Output” and implementation of the PWM in the product.
42.5.9 Conversion Performances
For performance and electrical characteristics of the ADC, see the product electrical characteristics.
42.6 Functional Description
42.6.1 Analog-to-Digital Conversion
The ADC uses the ADC Clock to perform conversions. Converting a single analog value to a 12-bit digital data requires
Tracking Clock cycles as defined in the field TRACKTIM of the “ADC Mode Register” . The ADC Clock frequency is
selected in the PRESCAL field of the Mode Register (ADC_MR). The tracking phase starts during the conversion of the
previous channel. If the tracking time is longer than the conversion time, the tracking phase is extended to the end of the
previous conversion.
The ADC clock range is between MCK/2, if PRESCAL is 0, and MCK/512, if PRESCAL is set to 255 (0xFF). PRESCAL
must be programmed in order to provide an ADC clock frequency according to the parameters given in the product
“Electrical Characteristics” section.
ADC AD11 PC15 X1
ADC AD12 PC12 X1
ADC AD13 PC29 X1
ADC AD14 PC30 X1
Table 42-3. I/O Lines