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AT91SAM7L-EK Evaluation Board User Guide 4-1

6370A–ATARM–15-Feb-08

Section 4

Configuration

4.1 Configuration Jumpers

The configuration jumpers are all fitted on the handheld board.

Note: 1. These jumpers are provided for use as power consumption measurement. By default, they are closed.

To use this feature, the user has to open the strap and insert an anmeter.

Table 4-1. Configuration Jumper Settings (See Figure 4-1)

Designation

Default

Setting Feature

J101 Open

Erases all internal Flash memory and the NVM Configuration Bits when the board is

powered. To do so, the user will have to close this for at least 220 ms.

J103 Closed VDDCORE (Core Power Supply) Jumper

(1)

J106 Closed VDDIO1 (I/O Lines (PIOC) and Voltage Regulator Power Supply) Jumper

(1)

J107 2 - 3

VDDINLCD (LCD Charge Pump Supply) Jumper Select

1 - 2: Powered by VCC (3.3V)

2 - 3: Not powered (connected to GND)

J108 2 - 3

VDDLCD (LCD Charge Pump Intermediate Voltage) Jumper Select

1 - 2: Powered by VDD3V6 (Output of the LCD Charge Pump)

2 - 3: Powered by VCC (3.3V)

J109 Closed

VDDIO2 (LCD I/O Lines Power Supply (PIOA and PIOB)/LCD Voltage Regulator

Output) and VDDLCD (LCD Charge Pump Intermediate Voltage) Configuration

Jumper

• Closed: VDDIO2 and VDDLCD are powered by VCC (3.3V), the LCD Voltage

Regulator is not used and in this case, J108 Jumper shall be put in 2 - 3 position.

• Opened: the LCD Voltage Regulator is in use and provides VDDIO2. VDDLCD is

provided by VDD3V6 or VCC, depending on J108 Configuration.

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