AT91SAM7A1-EK Atmel, AT91SAM7A1-EK Datasheet - Page 8

• Manufacturer Part Number: AT91SAM7A1-EK
• Description: BOARD EVAL FOR AT91SAM7A1
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM7A1-EK

• Contents: Evaluation Board, Parallel Cable and CD-ROM
• Processor To Be Evaluated: AT91SAM7A1
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: AT91SAM7A1
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6114A–ATARM–09/04
2.4
2.5
2.6
2-2
Voltage
Powering Up the
Board
Measuring
Current
Consumption on
the AT91SAM7A1
DC power is supplied to the board via the 2.1 mm connector (J1) shown in Figure 2-2.
The polarity of the power supply is not critical. The minimum voltage required is 7V. The
supply must be isolated from ground. The 0 volts of the on-board regulated supplies can
be connected to ground via any one of the 4 test points, TP1 to TP4.
Figure 2-2. 2.1mm Connector
The board has a voltage regulator providing +3.3V and another providing +5V. These
regulators allow the input voltage to be from 7V to 12V.
Figure 2-3. Powering Up the Board
The board is designed to generate the entire power supply of the AT91SAM7A1 device.
The PCB power tracks to the ARM7 core, the I/O and the analog cells are independent.
This feature enables measurement of the current consumption of the different major
parts of the AT91SAM7A1 device.
Table 2-1. Current Consumption Measurement Procedure
Block to Measure
Analog Cells
I/O Cells
Core
The red LED marked
"DS1" lights up
Switch the
power on
End
Yes
Strap to Unsolder
No
AT91SAM7A1-EK Evaluation Board User Guide
E1
E2
E3
Positive (+) or
Negative(-)
Switch off, check the
supply connections
fuse and the power
Connect an ammeter in place
of the strap
Action