GL800AHU35 USB 2.0 UTMI Compliant Transceiver IP Core
CHAPTER 3 BLOCK DIAGRAM
3.1 System Configuration
USB 2.0 Transceiver Macrocell Interface
SIE
Device
(Serial Interface
Specific Logic
Engine)
UTMI
GL800AHU35
USB 2.0
Figure 3.1 - System Diagram
1. GL800AHU35
The USB 2.0 UTMI Transceiver, which handles the low level USB protocol and signaling, and shifts the
clock domain of the data from the USB 2.0 rate to one that is compatible with the general logic.
2. Serial Interface Engine
The Serial Interface Engine can be further sub-divided into 2 types of sub-blocks; the SIE control logic and
the Endpoint logic. The SIE control logic contains the USB PID and address recognition logic, and other
sequencing and state machine logic to handle USB packets and transactions. The Endpoint logic contains
the endpoint specific logic: endpoint number recognition, FIFOs and FIFO control, etc.
SIE logic module can be developed by peripheral vendors or purchased from IP vendors. The
standardization of the UTMI allows multiple sources of SIE logic to connect with GL800HT25 to
implement the USB 2.0 High-Speed design.
3. Device Specific Logic
This block is the glue that ties the USB interface to the specific application of the device.
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