Expansion Interface; Power Architecture - Analog Devices ADSP-BF707 EZ-KIT Lite Manual

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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
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
board, the signal (1.1V), as well as the
VDD_INT
The voltage levels can be measured using INA3221 IC (
, and
VDD_INT VDD_EXT
measured with this same device when the corresponding jumper is
ADSP-BF707 EZ-KIT Lite Evaluation System Manual
Using ADSP-BF707 EZ-KIT Lite
signal and the 3.3V power requirements of the
. Current consumption of the power rail could be
Schematic.
signal (1.8V).
VDD_DMC0
) for 3.3V,
U48
1-13