Mode one, interrupt transmission type
It supports game controllers, keyboards, mice and other related input devices. The amount of data transmission between such devices and the host is small, non-periodical, sensitive to response time, and fast.
Mode two, data block transmission type
Supports peripherals such as printers, scanners, digital cameras, etc. The amount of data transferred between such peripherals and the host is large, and USB can only perform this type of data transfer when the bandwidth is satisfied.
Mode three, control transmission type
Support the transmission of control, status, configuration and other related information between the external device and the host, and provide a control channel between the peripheral and the host. Each peripheral supports the control transmission type, so that the host and the peripheral can be Transfer configuration and command/status information.
Mode four, isochronous transmission type
It supports data transmission between peripherals and the host with periodic, limited delay and bandwidth, and the data transmission rate is unchanged. This type of error-free check, so it cannot guarantee the correct data transmission, supports like computer-phone integrated systems ( CTI) and data transmission between audio system and host.
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