Table of Contents
Advertisement
CHAPTER 11 USB FUNCTION
11.3 Registers of USB Function
11.3.4
Time Stamp Register (TMSP)
The time stamp register (TMSP) displays a frame number when an SOF packet is
received.
■ Time Stamp Register (TMSP)
Figure 11.3-6 shows the bit configuration of the timestamp register (TMSP).
Address bit
7
0000DE
H
0
0
R
Address bit
15
0000DF
-
H
X
X
-
R : Read only
The functions of each bit of the time stamp register (TMSP) are described below.
[bit15 to bit11] Undefined bits
Writing has no effect on the operation. Reading is undefined.
[bit10 to bit0] TMSP: Time stamp bits
Frame number by the reception of the SOF packet is shown. When the SOF packet is received, frame
number is updated.
208
Figure 11.3-6 Time Stamp Register (TMSP)
6
5
4
0
0
0
0
0
0
R
R
R
14
13
12
-
-
-
X
X
X
X
X
X
-
-
-
FUJITSU MICROELECTRONICS LIMITED
3
2
TMSP
0
0
0
0
R
R
11
10
-
X
0
X
0
-
R
MB90335 Series
1
0
Time stamp register
←
0
0
Initial value
←
0
0
RST Reset
←
R
R
Access
9
8
TMSP
←
0
0
Initial value
←
0
0
RST Reset
←
R
R
Access
CM44-10137-6E
Advertisement
Table of Contents
