Time Stamp Register (Tmsp) - Fujitsu F2MC-16LX Hardware Manual

13.3.4

Time Stamp Register (TMSP)

The time stamp register (TMSP) displays a frame number when an SOF packet is
received.
Time Stamp Register (TMSP)
Figure 13.3-6 shows the bit configuration of the timestamp register (TMSP).
Address bit 7
0000DE
H
0
0
15
Address bit
0000DF Reserved
H
The functions of each bit of the time stamp register (TMSP) are described below.
[bit 15 to bit 11] Reserved bit
These bits are reserved bits. Writing has no effect on the operation. Reading is indeterminate.
[bit 10 to bit 0] TMSP: Time stamp bit
Frame number by the reception of the SOF packet is shown. When the SOF packet is received, frame
number is updated.
Figure 13.3-6 Time Stamp Register (TMSP)
6 5 4
0 0 0
0 0 0
14 13 12
Reserved Reserved Reserved
3 2
TMSP
0 0
0 0
R
11 10
Reserved TMSP
CHAPTER 13 USB FUNCTION
1 0
Time stamp
register
←
0 0
Initial value
←
0 0
RST Reset
←
Access
9 8
←
000
Initial value
←
000
RST Reset
←
R
Access
279