Renesas M3A-HS71, User Manual

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Functional Overview
2.4U USB Interface
Rev.1.01 2008.05.07 2-21
REJ11J0012-0101
2
2.4 USB Interface
The SH7670 mounted on the SH7670 CPU board contains the USB controller preparing for function control
function and host control function for the USB standard 2.0.
In addition, the USB series A receptacle is standard mounted as a connector. The board is configured to be able to
mount a Mini-B receptacle. When a Mini-AB receptacle or Mini-B receptacle is mounted, the USB series A receptacle
should be removed.
Figure 2.4.1 shows USB interface block diagram.
Figure 2.4.1 USB Interface Block Diagram
[VBUS Power Supply/Over Current Detection Control]
In the VBUS power supply control, the VBUS power is supplied by setting the port PB04 to "L" level output, and the
VBUS power supply can be cut by setting the port PB04 to "H" level output. When the over current is flowed to the
VBUS, the over current detection can be checked by the interrupt or input port with the PB03/IRQ1 pins connected to
the pin FLAG of U8 to output "L" level from the pin FLAG of U8.