Analog Devices EZ-KIT Lite ADSP-BF707, System Manual

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ADSP-BF707 EZ-KIT Lite Evaluation System Manual 1-13
Using ADSP-BF707 EZ-KIT Lite
Expansion Interface
The expansion interface allows a custom-design daughter board to be
tested across various hardware platforms that have the same expansion
interface.
The Expansion Interface III (EI3) implemented on the ADSP-BF707
EZ-KIT Lite consists of three connectors: P1A, P1B, and P1C. The con-
nectors contain a majority of the processor’s signals. For pinout
information, go to
ADSP-BF707 EZ-KIT Lite Schematic .
Limits to current and interface speed must be taken into consideration
when using the expansion interface. Current for extenders connected to
the EI3 connectors can be sourced from the EZ-KIT Lite; therefore, the
current should be limited to 250 mA for 5V, and 300 mA from the 3.3V
planes. If more current is required, a separate power connector and a regu-
lator must be designed on the daughter card. Additional circuitry
implemented on extender cards can add extra loading to signals, decreas-
ing their maximum effective speed.

Analog Devices does not support and is not responsible for the
effects of additional circuitry.
Power Architecture
The ADSP-BF707 EZ-KIT Lite has three primary voltage domains: 3.3V,
1.1V, and 1.8V. The power input is a 5V wall adaptor.
The Analog Devices ADP5024 controller provides all three voltage levels,
3.3V for the
VDD_EXT
signal and the 3.3V power requirements of the
board, the
VDD_INT
signal (1.1V), as well as the
VDD_DMC0
signal (1.8V).
The voltage levels can be measured using INA3221 IC (
U48
) for 3.3V,
VDD_INT
, and
VDD_EXT
. Current consumption of the power rail could be
measured with this same device when the corresponding jumper is