4.5.5.8. USB I/F

USB (Universal Serial Bus) I/F is composed of IC1 built-in USB Controller.
The USB controller is a USB 1.1 compliant device controller, that supports Full-speed (12Mbps). This controller includes USB serial
Interface engine, USB transceiver, FIFOs, control/status registers and Interface circuit for built-in CPU.Supported transfer modes
are control transfer and bulk transfer. The connection of IC1 and USB connector (CN9) is shown below.
USB data receive process is following. IC1 receives data from host and USB controller analyze an attribute of the data. If it is a
control command, the controller sends corresponding data back. If it is a print data, it is stored in FIFO. Afterthat, USB controller
reports CPU to receive a data with an interrupt. If the data is a print data, USB controller reads data from FIFO and transfers to
system memory with internal DMA controller.
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KX-P7105 / KX-P7110