Datasheet

1343
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
45.5 Product Dependencies
45.5.1 Power Management
The AFE Controller is not continuously clocked. The programmer must first enable the AFE Controller MCK in the
Power Management Controller (PMC) before using the AFE Controller. However, if the application does not
require AFEC operations, the AFEC clock can be stopped when not needed and restarted when necessary.
Configuring the AFE Controller does not require the AFEC clock to be enabled.
45.5.2 Interrupt Sources
The AFEC interrupt line is connected on one of the internal sources of the Interrupt Controller. Using the AFEC
interrupt requires the interrupt controller to be programmed first.
45.5.3 Analog Inputs
The analog input pins can be multiplexed with PIO lines. In this case, the assignment of the AFEC input is
automatically done as soon as the corresponding channel is enabled by writing the register AFEC_CHER. By
default, after reset, the PIO line is configured as input with its pull-up enabled and the AFEC input is connected to
the GND.
45.5.4 Temperature Sensor
The temperature sensor is connected to Channel 15 of the AFEC.
The temperature sensor provides an output voltage V
T
that is proportional to absolute temperature (PTAT). To
activate the temperature sensor, TSON bit (AFEC_ACR) needs to be set.
45.5.5 I/O Lines
The AFE_ADTRG pin may be shared with other peripheral functions through the PIO Controller. In this case, the
PIO Controller should be set accordingly to assign the AFE_ADTRG pin to the AFEC function.
Table 45-2. Peripheral IDs
Instance ID
AFEC0 30
AFEC1 31
Table 45-3. I/O Lines
Instance Signal I/O Line Peripheral
AFEC0 AFE0_ADTRG PA8 B
AFEC0 AFE0_AD0 PA17 X1
AFEC0 AFE0_AD1 PA18 X1
AFEC0 AFE0_AD2/WKUP9 PA19 X1
AFEC0 AFE0_AD3/WKUP10 PA20 X1
AFEC0 AFE0_AD4/RTCOUT0 PB0 X1
AFEC0 AFE0_AD5/RTCOUT1 PB1 X1
AFEC0 AFE0_AD6 PC13 X1
AFEC0 AFE0_AD7 PC15 X1
AFEC0 AFE0_AD8 PC12 X1
AFEC0 AFE0_AD9 PC29 X1