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CLASSIFICATION
Einstufung
SUBJECT
Thema
CUSTOMER'S CODE
EvalPAN4555
5.2.
D.C. POWER FROM A USB DEVICE:
In case no dedicated supply is available, DC supply can be taken from an USB connection.
The +5V DC from the USB feeds the linear regulator for the modules VCC supply of
2,1/2,7/3,4Vdc (see table 1).
Please note that communication via the USB connector is not possible.
Please take into account that when using the +5V DC feed to the 34-pin-headers in
combination with USB power supply the voltage is not +5V but unregulated 4.3 V DC due to
the voltage drop at a protection diode connected in series on the testboard.
Warning:
Do not overload the USB power source. Check for the current available from
your USB device in order to avoid malfunction of or damage to your USB power source.
5.3.
POWER ON
Set SW7 to the position 1 = on. (With power from USB position 1 is off and position 2 is on).
D7 should be lit indicating that +5Vdc supply is available on the testboard. D8 should be lit
indicating that the regulated Vcc module supply is available.
The dc regulator output voltage is set with a jumper on JP3 or JP4 as follows:
jumper on 2-pin header
JP4 only
JP3 only
no jumpers
European Technology Center
Panasonic Electronic Devices (EUROPE) GmbH
PRELIMINARY
EvalBoard PAN4555
PANASONIC'S CODE
regulator output voltage VCC
2,7 Vdc
3,4 Vdc
2,1 Vdc
No.
DS-Eval4555-2400
PAGE
Seite
DATE
Datum
remarks
typical for PAN4555
maximum for PAN4555
minimum for PAN4555
APPROVED
CHECKED
genehmigt
geprüft
REV.
01
7 of 16
30.03.2007
(Table 2)
DESIGNED
Erstellt
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