Atmel AT91EB42 Measuring, Current, Consumption on, AT91M42800, Testing, Evaluation Board

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Setting Up the AT91EB42 Evaluation Board

2.4Jumper Settings JP1 is used to boot standard or user programs. For standard operations, set it in the STD position.

JP8 is used to select the core power supply of the AT91M42800: 3.3V or 1.8V. For oper- ation at 1.8V, MCK frequency shall be limited to 17 MHz.

For more information about jumpers and other straps, see Section 5.

2.5Powering Up DC power is supplied to the board via the 2.1 mm socket (J1) shown in Figure 2-2.The

the Board

polarity of the power supply is not critical. The minimum voltage required is 7V.

Figure 2-2.2.1 mm Socket

positive (+) or negative (-)

 

 

2.1 mm connector

 

 

A battery power supply can be connected to the board via the J3 connector. A battery

 

 

fast-charge controller is provided on-board to charge this battery.

 

 

The board has a voltage regulator providing +3.3V. The regulator allows the input volt-

 

 

age to range from 7V to 9V. When you switch the power on, the red LED marked

 

 

POWER lights up. If it does not, switch off and check the power supply connections.

 

 

 

2.6

Measuring

The board is designed to generate the power for the AT91 product, and only the AT91

 

Current

product, through the jumper JP5 (VDDIO) and JP8 (VDDCORE). This feature enables mea-

 

Consumption on

surements to be made of the current consumption of the AT91 product.

 

the AT91M42800

See Section 5 for further details.

 

 

 

2.7

Testing the

To test the AT91EB42 Evaluation Board, perform the following steps:

 

AT91EB42

1. Hold down the SW1 button and power-up the board, or generate a reset and wait

 

Evaluation Board

for the light sequence on each LED to complete. All the LEDs light once and the

 

 

LED D1 remains lit.

2. Release the SW1 button. The LEDs D1 to D7 light up one after the other. If any of the LEDs lights up twice, there is an error.

The LEDs represent the following components:

D1 for the internal RAM

D2 for the external RAM

D3 for the external Flash

D4 for the serial EEPROM

D5 for the SPI DataFlash®

D6 for the EEPROM

D7 for the USART ￿D8 is reserved

If a test is not carried out, the corresponding LED remains unlit and the test sequence restarts.

2-2

AT91EB42 Evaluation Board User Guide

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Contents AT91EB42 Evaluation Board User Guide Page Table of Contents Appendix a Configuration Straps Table of ContentsSection Overview ScopeDeliverables Evaluation Board Two serial portsOverview ASBLayout Section Setting Up the AT91EB42 Evaluation BoardElectrostatic Warning Testing BoardMeasuring CurrentProgram Section On-board SoftwareAT91EB42 Evaluation Board Programmed Default Memory Mapping Default SpeedDownloader On-board SoftwareConnectors Section Circuit DescriptionProcessor ExpansionPower MemoriesConverter Crystal QuartzCircuit Description Circuit Description Section Appendix a Configuration Straps Configuration Straps CB1 23, JP1Appendix a Configuration Straps CB18 PB20 ADC Write Access Signal CB19 PB18 End of Fast Charge SignalCB15 Serial DataFlash Enabling CB17 SPI Eeprom EnablingConsumption MeasurementStrap JP5 JP6 Increasing Memory SizeSection Appendix B Schematics SchematicsAppendix B Schematics PCB LayoutAT91EB42 Evaluation Board User Guide EBI MemoriesEBI Memories Schematics AppendixI/O and EBI Expansion Connectors Serial Interface ValbpAT91M42800 Reset and Jtag Schematics Interface ICEVDDCORE=1.8V Saft VRE 1/2 AA AT91EB42 Evaluation Board User Atmel Headquarters Atmel Operations
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