2.3
EZ-USB Enhancements
The EZ-USB chip provides additional enhancements outside the 8051. These include:
•
•
•
•
Fast external transfers (Autopointer, Fast Transfer Mode)
Vectored USB interrupts (Autovector)
Separate buffers for SETUP and DATA portions of a CONTROL transfer.
Breakpoint Facility.
2.4
EZ-USB Register Interface
The 8051 communicates with the EZ-USB core through a set of memory mapped regis-
ters. These registers are grouped as follows:
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•
•
•
•
•
•
Endpoint buffers and FIFOs
8051 control
IO ports
Fast Transfer
I2C Controller
Interrupts
USB Functions
These registers and their functions are described throughout this manual. A full descrip-
tion of every register and bit appears in Chapter 12, “EZ-USB Registers.”
Page 2-2
Chapter 2. EZ-USB CPU
EZ-USB TRM v1.9
CYPRESS [ CYPRESS ]
