CLASSIFICATION
Einstufung
PRELIMINARY
No.
DS-Eval4555-2400
REV.
01
SUBJECT
Thema
EvalBoard PAN4555
PAGE
Seite
7 of 16
CUSTOMER’S CODE
EvalPAN4555
PANASONIC’S CODE
DATE
Datum
30.03.2007
European Technology Center
Panasonic Electronic Devices (EUROPE) GmbH
APPROVED
genehmigt
CHECKED
geprüft
DESIGNED
Erstellt
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
regulator output voltage VCC
remarks
JP4 only
2,7 Vdc
typical for PAN4555
JP3 only
3,4 Vdc
maximum for PAN4555
no jumpers
2,1 Vdc
minimum for PAN4555
(Table 2)
