Fujitsu MB96300 series Hardware Manual page 819

F2mc-16fx 16-bit

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Device disconnection

This chapter describes the device disconnection detection.

■ Device disconnection

Once both Mini-host pins D+ and D- become "L", the disconnection timer starts, and sets the

HSTATE:CSTAT bit to "0" when both pins detect "L" for 2.5 ms or longer, which determines the

device disconnection. The HIRQ:DIRQ ﬂag is also set when the device is detected cut off. If the

HCNT0:DIRE bit is "1", this triggered an interrupt. Clearing the HIRQ:DIRQ ﬂag clears the

When a reset is performed on the USB bus, it determines that the device is disconnected and

sets the HSTATE:CSTAT bit to "0", but the HIRQ:DIRQ bit does not become "1".

CHAPTER 30 USB Mini-host