SAM7S16_14 Datasheet, PDF (540/775 Pages) ATMEL Corporation – Internal High-speed Flash

36.3 Signal Description
Table 36-1.
Pin Name
ADVREF
AD0 - AD7
ADTRG
ADC Pin Description
Description
Reference voltage
Analog input channels
External trigger
36.4 Product Dependencies
36.4.1 Power Management
The ADC Controller clock (MCK) is always clocked.
36.4.2 Interrupt Sources
The ADC interrupt line is connected on one of the internal sources of the Advanced Interrupt Controller. Using the
ADC interrupt requires the AIC to be programmed first.
36.4.3 Analog Inputs
The analog input pins can be multiplexed with PIO lines. In this case, the assignment of the ADC input is automat-
ically 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.
36.4.4 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.
36.4.5 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 non-connected.
36.4.6 Conversion Performances
For performance and electrical characteristics of the ADC, see the DC Characteristics section.
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
540