Other Conventions
USB
Indicates a global (not endpoint-specific) USB function.
ADDR
VAL
Is an address.
Means “valid.”
FRAME Is a frame count.
PTR Is an address pointer.
Register Name
Register Function
Address
b7
b6
b5
b4
b3
b2
b1
b0
bitname
bitname
bitname
bitname
bitname
bitname
bitname
bitname
R, W access
Default val
R, W access
Default val
R, W access
Default val
R, W access
Default val
R, W access
Default val
R, W access
Default val
R, W access
Default val
R, W access
Default val
Figure 12-1. Register Description Format
Figure 12-1 illustrates the register description format used in this chapter.
•
The top line shows the register name, functional description, and address in the
EZ-USB memory.
•
•
•
•
The second line shows the bit position in the register.
The third line shows the name of each bit in the register.
The fourth line shows 8051 accessibility: R(ead), W(rite), or R/W.
The fifth line shows the default value. These values apply after a Power-On-Reset
(POR).
Page 12-2
Chapter 12. EZ-USB Registers
EZ-USB TRM v1.9
CYPRESS [ CYPRESS ]
