1.2.3. Baseboard LEDs

The Integrator/CP baseboard LEDs are shown in Figure 1.4.

Ethernet LEDs A and B are duplicated within the Ethernet connector. The function of the Ethernet LEDs can be configured from the Ethernet control registers, see Ethernet interface and the datasheet for the Ethernet controller.)

Figure 1.4. Baseboard LEDs

The function of the LEDs on the Integrator/CP baseboard is summarized in Table 1.2.

Table 1.2. Baseboard LED functional summary

LED

Color

Function

3V3 OK

(D9)

Green

Indicates that a 3.3V supply is available.

5V OK

(D10)

Green

Indicates that a 5V supply is available.

STANDBY

(D12)

Red

This LED illuminates when power is applied to the power connector to indicate that the power supply is in standby mode. To power on the Integrator/CP, press the POWER button.

LED0

(D16)

Green

This is a general purpose LED controlled by writing to bit 0 in the LED_LIGHTS register.

LED1

(D17)

Yellow

This is a general purpose LED controlled by writing to bit 1 in the LED_LIGHTS register.

LED2

(D18)

Red

This is a general purpose LED controlled by writing to bit 2 in the LED_LIGHTS register.

LED3

(D19)

Green

This is a general purpose LED controlled by writing to bit 3 in the LED_LIGHTS register.

Note

The Ethernet interface IC, LAN91C111, directly controls two LEDs on the Ethernet connector. These indicate activity on the interface.

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