Analog Devices ADSP-BF526 EZ-Board, Руководство пользователя

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LEDs
2-28 ADSP-BF526 EZ-Board Evaluation System Manual
Ethernet LEDs (LED1–2)
When
LED2
is lit solid, it indicates that the SMSC LAN8700 chip (
U29
)
detects a valid link. When transmit or receive activity is sensed,
LED1
flashes as an activity indicator. For more information on the LEDs, refer
to the LAN8700 chip data sheet provided by the product manufacturer.
GPIO LEDs (LED3–5)
Three LEDs connect to three general-purpose I/O pins of the processor
(see
Table 2-13 ). The LEDs are active high and are lit by writing a
1
to the
correct programmable flag signal.
Reset LED (LED7)
When
LED7
is lit, it indicates that the master reset of all major ICs is
active. The reset LED is controlled by the Analog Devices ADM13305
supervisory reset circuit. You can assert the reset push button (
SW18
) to
assert a master reset and activate
LED7
. For more information, see “Reset
Push Button (SW18)” on page 2-16.
Batt GD LED (LED8)
When
LED8
is lit (green), it indicates that the BQ27500 fuel gauge (
U38
)
has successfully initialized the lithium ion battery. This is not an indica-
tion of the battery capacity. When the battery switch (
SW22
) is
OFF
, but the
Table 2-13. GPIO LEDs
LED Reference Designator Processor Programmable Flag Pin
LED0 PF8
LED1 PG11
LED2 PG12