Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet
Product codes
ATSAM4E-EK
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
1344
45.5.6 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.
of the timer counters may be unconnected.
45.5.7 PWM Event Line
PWM Event Lines may or may not be used as hardware triggers depending on user requirements.
45.5.8 Fault Output
The AFE Controller has the FAULT output connected to the FAULT input of PWM. Please refer to
and implementation of the PWM in the product.
45.5.9 Conversion Performances
For performance and electrical characteristics of the AFEC, see the product DC characteristics.
45.6
Functional Description
45.6.1 Analog-Front-End Conversion
The AFEC uses the AFEC 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 AFEC Mode Register (AFEC_MR) and
Transfer Clock cycles as defined in the field TRANSFER of the same register. The AFEC Clock frequency is
selected in the PRESCAL field of the AFEC_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.
requires Tracking Clock cycles as defined in the field TRACKTIM of the AFEC Mode Register (AFEC_MR) and
Transfer Clock cycles as defined in the field TRANSFER of the same register. The AFEC Clock frequency is
selected in the PRESCAL field of the AFEC_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 AFEC 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 AFEC clock frequency according to the parameters given
in the product electrical characteristics.
PRESCAL must be programmed in order to provide an AFEC clock frequency according to the parameters given
in the product electrical characteristics.
AFEC0
AFE0_AD10
PC30
X1
AFEC0
AFE0_AD11
PC31
X1
AFEC0
AFE0_AD12
PC26
X1
AFEC0
AFE0_AD13
PC27
X1
AFEC0
AFE0_AD14
PC0
X1
AFEC1
AFE1_AD0/WKUP12
PB2
X1
AFEC1
AFE1_AD1
PB3
X1
AFEC1
AFE1_AD2
PA21
X1
AFEC1
AFE1_AD3
PA22
X1
AFEC1
AFE1_AD4
PC1
X1
AFEC1
AFE1_AD5
PC2
X1
AFEC1
AFE1_AD6
PC3
X1
AFEC1
AFE1_AD7
PC4
X1
Table 45-3.
I/O Lines