AN-2070 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – AVS Adaptor Board for USB AVS System Mainboards

AVS Adaptor Board for USB
National Semiconductor
Application Note 2070
AVS System Mainboards
Michael Drake
August 4, 2010
AVS Adaptor Board for USB AVS
System Mainboards
The AVS Adaptor Board (AAB) is not intended for standalone
use, but rather to enable interconnect of non-PEK/SPEK foot-
print daughterboards to National’s PowerWise/SPMI System
Mainboards. The AAB provides a means to plug in National
evaluation boards with the modified DOSA style connector,
the proprietary MAK style connector, or the standard 1x9 SIP
interface. The AAB provides various power supply options for
bench evaluation, and several jumper options to support the
desired setup.
Evaluation Board Overview
The AAB is, for the most part, a passive board. The vast ma-
jority of its functionality is to appropriately route power and
signals from the system mainboard and/or bench equipment
to the DUT. The only active circuitry on the board is a low-
power LDO which can be used to provide the PWI/SPMI I/O
signaling voltage. Because of the flexibility designed into the
board, the user must be very careful with the jumper set-up
of the board stack to ensure no damage is done to any of the
circuitry. While it would be impossible to cover all combina-
tions of board stacks, great effort will be taken to provide a
method/procedure to ensure that the boards can be config-
ured without damaging anything.
FIGURE 1. AVS Adaptor Board
30127001
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