Renesas M16C FAMILY User Manual page 32

(2) When using 3.3 V
The power for the Target MCU is not supplied from the USB Monitor Board and
must therefore be supplied from the Target Board. In this case, set the power
source supply selector on the USB Monitor Board to the TARGET side as shown in
Figure 4-3.
Figure 4-3 Power source supply selector-2
(3) Other
Depending on the host computer (PC) environment you are using, no 5 V power
supply may be fed to the Target MCU even when the select switch on the USB
Monitor Board is set to the USB side. In such a case, set the power source supply
selector to the TARGET side so that the power for the Target MCU will be supplied
from the Target Board.
When using 3.3 V, set the
switch to the TARGET
29
4 Using the FoUSB
side.