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■ Notations for Registers
The notations described below are used to explain each USB interface register.
Figure 17.2-2 shows the notations for the registers.
Address:0000-0000
*1: Indicates the bit positions (15 to 0) in each register.
*2: Indicates the bit names in each register.
*3: Indicates that the register does not exist physically. The read value is always 0.
*4: Indicates whether the bit is readable and/or writable.
W: Write-only
R: Read-only
R/W: Readable and writable
*5: Indicates the bit value after reset (RESET = 0)
"X": Undefined
"0": 0
"1": 1
Note:
Each register must be accessed in units of 16 bits.
Figure 17.2-2 Notations for Registers
*1
15
14
13 12 11 10
H
*3
*2
*4
R
R
R
R
R
R
9
8
7
6
5
4
3
R
R
R
R
R
R
R
CHAPTER 17 USB FUNCTION
2
1
0
Initial value
XXXXXXXXXXXXXXXX
R
R
R
*5
B
383
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