LRR-TUM-Logo Department of Informatics
Technische Universität München
Informatik X: Rechnertechnik und Rechnerorganisation / Parallelrechnerarchitektur
Prof. Dr. Arndt Bode , Prof. Dr. Hans Michael Gerndt
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Next: Enumeration and Device Descriptors Up: USB Devices and Transfer Previous: Hubs   Contents   Index

Data Flow Types

The communication on the USB is done in two directions and uses 3 different transfer types. Data directed from the host to a device is called downstream or OUT transfer. The other direction is called upstream or IN transfer. Depending on the device type different transfer variants are used:


next up previous contents index
Next: Enumeration and Device Descriptors Up: USB Devices and Transfer Previous: Hubs   Contents   Index
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2001-01-08
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