RTC Interface
1-22
ADSP-BF527 EZ-KIT Lite Evaluation System Manual
UART0
and
UART1
are connected to the expansion interface.
UART0
of the
processor also is available via a STAMP connector (
P5
). See
Example programs are included in the EZ-KIT Lite installation directory
to demonstrate UART and RS-232 operations.
For more information on the UART interface, refer to the
ADSP-BF52x
Blackfin Processor Hardware Reference
.
RTC Interface
The ADSP-BF527 processor has a real-time clock (RTC) and a watchlog
timer. Typically the RTC interface is used to implement a real-time
watchlog or life counter of the time elapsed since the last system reset. The
EZ-KIT Lite is equipped with a Sanyo (CR2430) lithium coin 3V battery
supplying 280 mAh. The 3V battery and the 3.3V supply of the board
connect to the
RTC
power pin of the processor. When the EZ-KIT Lite is
powered, the RTC circuit uses the board power to supply voltage to the
RTC
pin. When the EZ-KIT Lite is not powered, the RTC circuit uses the
lithium battery to maintain the power to the
RTC
pin. After removing the
mylar, the battery will last for about 1 year with the EZ-KIT Lite
unpowered.
Example programs are included in the EZ-KIT Lite installation directory
to demonstrate the RTC features.
L
The EZ-KIT Lite is shipped with a protective Mylar sheet placed
between the coin battery and the positive pin of the battery holder.
Please remember to remove the Mylar sheet before trying to use
RTC functionality of the processor.
For more information on the RTC and watchdog timer, refer to the
ADSP-BF52x Blackfin Processor Hardware Reference
.
www.BDTIC.com/ADI
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