Rtc Interface; Leds And Push Buttons - Analog Devices ADSP-BF526 EZ-Board Manual

RTC Interface

For more information on the UART interface, refer to the ADSP-BF52x
Blackfin Processor Hardware Reference.
RTC Interface
The ADSP-BF526 processor has a real-time clock (RTC) and a watchdog
timer. Typically, the RTC interface is used to implement a real-time
watchdog or a life counter of the time elapsed since the last system reset.
The EZ-Board is equipped with a Panasonic CR1632 lithium coin, 3V
battery supplying 125 mAh. The 3V battery and 3.3V supply of the board
connect to the
powered, the RTC circuit uses the board power to supply voltage to the
pin. When the EZ-Board is not powered, the RTC circuit uses the
RTC
lithium battery to maintain the power to the
mylar, the battery lasts for about one year with the EZ-Board unpowered.
Example programs are included in the EZ-Board installation directory to
demonstrate the RTC features.

The EZ-Board is shipped with a protective Mylar sheet placed
between the coin battery and positive pin of the battery holder.
Remove the Mylar sheet before using the RTC in the processor.
For more information on the RTC and watchdog timer, refer to the
ADSP-BF52x Blackfin Processor Hardware Reference.

LEDs and Push Buttons

The EZ-Board provides two push buttons and three LEDs for gen-
eral-purpose I/O and two additional push buttons intended for power
down and wake functionality, which also can be used as GPIO flag pins.
The three LEDs, labeled
and pins of the processor (respectively). For information on how to
PG12
1-26
power pin of the processor. When the EZ-Board is
RTC
through
LED0
ADSP-BF526 EZ-Board Evaluation System Manual
pin. After removing the
RTC
, are accessed via the
LED2
, ,
PF8 PG11