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iWave Systems Technologies Pvt. Ltd.
RZ/G1E SODIMM Development Platform Hardware User Guide
2.5.4
USB2.0 Host
RZ/G1E SODIMM carrier board supports USB2.0 High Speed Host interface through RZ/G1E
CPU’s
USB1 host
interface. This USB host interface signals from SODIMM Edge connector is connected to 2port USB HUB
“
USB2422/MJ
”
to support two USB 2.0 high speed host ports in the carrier board. USB host ouput1 of USB Hub is
connected to USB Type A connector1 (J5) and USB host ouput2 is connected to USB Type A connector2 (J4).
The VBUS power of these USB2.0 connectors are connected through current limiting power switch which limits the
current above 500mA. If connected USB2.0 device takes more than 500mA current, this power switch limits the
current to constant mode and sends the over current indication signal to the over current indicator pin
(USB1_OVC(GP5_27)) of RZ/G1E CPU. These USB2.0 Type A connectors are physically located at the top of the board
as shown below.
Figure 8: USB 2.0 Host Ports