ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1063
ATSAM3U-EK
Manufacturer Part Number
ATSAM3U-EK
Description
KIT EVAL FOR AT91SAM3U CORTEX
Manufacturer
Atmel
Type
MCUr
Datasheets
1.ATSAM3U-EK.pdf
(2 pages)
2.ATSAM3U-EK.pdf
(61 pages)
3.ATSAM3U-EK.pdf
(1171 pages)
4.ATSAM3U-EK.pdf
(53 pages)
Specifications of ATSAM3U-EK
Contents
Board
Processor To Be Evaluated
SAM3U
Data Bus Width
32 bit
Interface Type
RS-232, USB
Operating Supply Voltage
3 V
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
SAM3U4E
Silicon Family Name
SAM3U
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT91SAM3U
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3U-EK
Manufacturer:
Atmel
Quantity:
10
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41.5.10
6430D–ATARM–25-Mar-11
ADC12B Timings
When a start conversion request occurs, the ADC12B is automatically activated. As the analog
cell requires a start-up time, the logic waits during this time and starts the conversion on the
enabled channels. When all conversions are complete, the ADC12B is deactivated until the next
trigger. Triggers occurring during the sequence are not taken into account.
The conversion sequencer allows automatic processing with minimum processor intervention
and optimized power consumption. Conversion sequences can be performed periodically using
a Timer/Counter output or a PWM Event line. The periodic acquisition of several samples can be
processed automatically without any intervention of the processor thanks to the PDC.
The conversion sequencer can only be used if all ADC12B inputs have the same input configu-
ration, e.g. same PGA gain, same input type (differential or single ended) and same input offset.
If input have different configurations, sequencer can’t be used because PGA gain, input type
and input offset can’t be changed.
Note:
Each ADC12B has its own minimal Startup Time that is programmed through the field
STARTUP in the Mode Register (ADC12B_MR).
In the same way, a minimal Sample and Hold Time is necessary for the ADC12B to guarantee
the best converted final value between the two channels selection. This time has to be pro-
grammed through the SHTIM bitfield in the Mode Register (ADC12B_MR).
Warning: No input buffer amplifier to isolate the source is included in the ADC12B. This must be
taken into consideration to program a precise value in the SHTIM field. See the section, ADC12B
Characteristics in the product datasheet.
The reference voltage pins always remain connected in normal mode as in sleep mode.
SAM3U Series
1063
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