Using the STK526
STK526 rev. B Hardware User Guide
2-9
7709B–AVR–05/07
2.2.2
Power Source Setting
Table 2-1 .
Power Supply
(1)
Setting
Notes:
1.
Caution:
The STK500 has its own “ON/OFF” switch
Vcc Source
Jumper position
VCC power
supply value
Comments
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VBUS
VBUS
(4,8V to 5.2V)
This is the default configuration.
This should be used for a typical USB
device “bus powered” application.
In this mode, the STK526 is powered
directly from the USB bus, and no
other external power supply is
required.
REG 5V
5V
This configuration can be used for a
USB “self powered” device
application”.
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 5V
regulator is used.
REG 3V3
3.3V
This configuration allows the STK526
to be used in a 3V range application.
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 3V3
regulator is used.
STK
Depends on
STK500 VTG
setting
This configuration allows the STK526
to be used with an STK500 board.
In this mode, the STK526 power
supply is generated and configured
according to the “VTG” parameter of
the STK500 (1).
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK