ISP1160
Embedded USB Host Controller
Philips Semiconductors
Bit
7
6
5
4
3
2
1
0
Symbol
Reset
Access
FN[7:0]
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
Table 25: HcFmNumber register: bit description
Bit
Symbol
−
Description
31 to 16
15 to 0
reserved
FN[15:0]
FrameNumber: This is incremented when HcFmRemaining is
reloaded. It rolls over to 0000H after FFFFH. When the
USBOperational state is entered, this will be incremented
automatically. The HC will set bit StartofFrame in the
HcInterruptStatus register.
10.2.4 HcLSThreshold register (R/W: 11H/91H)
The HcLSThreshold register contains an 11-bit value used by the HC to determine
whether to commit to the transfer of a maximum of 8-byte LS packet before EOF.
Neither the HC nor the HCD is allowed to change this value.
Code (Hex): 11 — read
Code (Hex): 91 — write
Table 26: HcLSThreshold register: bit allocation
Bit
31
30
29
28
27
26
25
24
Symbol
Reset
Access
Bit
reserved
reserved
0
0
0
0
0
0
0
0
R/W
23
R/W
22
R/W
21
R/W
20
R/W
19
R/W
18
R/W
17
R/W
16
Symbol
Reset
Access
Bit
0
0
0
R/W
13
0
0
0
0
0
R/W
8
R/W
15
R/W
14
R/W
12
R/W
11
R/W
10
R/W
9
Symbol
Reset
Access
Bit
reserved
0
LST[10:8]
0
R/W
7
0
R/W
6
0
R/W
4
0
R/W
3
1
R/W
2
1
R/W
1
0
R/W
0
R/W
5
Symbol
Reset
Access
LST[7:0]
0
0
1
0
1
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
9397 750 11371
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Product data
Rev. 04 — 04 July 2003
47 of 88
NXP [ NXP ]
