GL620USB Просмотр технического описания (PDF) - Genesys Logic

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GL620USB

GeneLink-Lite USB PC-to-PC File Transfer Controller

Genesys Logic 

4. Functional Description

GL620USB

Micro-

controller

USB Registers

&

FIFO Control

D+

D-

USB

Interface

8 Bytes FIFO

8 Byte FIFO

64 Byte FIFO

64 Byte FIFO

D+

USB

D-

Interface

Block diagram of GL620USB-Lite

The GL620USB-Lite is equipped with two full-speed USB ports, and each port has four endpoints to provide

different functions as follows:

- Endpoint 0: control transfer

- Endpoint 1: bulk-read transfer

- Endpoint 2: bulk-write transfer

- Endpoint 3: interrupt transfer

Two 8-bytes FIFO and four 64-bytes FIFO are built in the device as follows:

- Left 8-byte FIFO: provide a pipe to link left endpoint 0 and right endpoint 3. For example, if left host wants

to communicate with right host, left host can issue a no data control transfer and the setup command will be stored

Revision 1.6

-6-

Nov. 16, 2000

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