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CHAPTER 12 USB HOST
12.5 Operation of USB HOST
12.5
Operation of USB HOST
The operation of USB HOST is explained.
■ Operation of USB HOST
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Connection of device
The software detects that the external USB device was connected.
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Reset of USB bus
USB bus is reset.
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Token packet
Three kinds of tokens can be selected at the host mode.
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Data packet
The data packet is transmitted and received.
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Handshake packet
It informs send/receive partners of status via handshake packet.
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Retry function
When an error etc. occur at the packet termination, the retry operation is continued.
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SOF INTERRUPT
The interruption is generated.
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Error status
Various errors are displayed.
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Packet end
When the packet ends, the interruption is generated.
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Suspend-resume
It puts the USB circuit in suspend-resume status.
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Cutting of device
The detection of the status of HOST pins determines the disconnection.
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FUJITSU MICROELECTRONICS LIMITED
MB90335 Series
CM44-10137-6E
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