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JDP2S01T Datasheet, PDF (81/150 Pages) Toshiba Semiconductor – UHF~VHF Band RF Attenuator Applications
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Philips Semiconductors
ISP1362
Single-chip USB OTG controller
Table 52:
Bit
31 to 16
15 to 0
HcFmNumber register: bit description
Symbol Description
−
reserved
FN[15:0]
FrameNumber: This is incremented when HcFmRemaining is
reloaded. It needs to be rolled over to 0H after FFFFH. When the
USBOperational state is entered, this is incremented automatically.
The content needs to be written to HCCA after the HC has
incremented the FrameNumber (FN) at each frame boundary and
sent an SOF. However, the content needs to be written before
the HC reads the first Endpoint Descriptor (ED) in that frame. After
writing to HCCA, the HC needs to set the StartofFrame (SF) in
HcInterruptStatus.
15.2.4 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 the EOF.
Neither the HC nor the HCD is allowed to change this value. Table 53 shows the bit
allocation of the register.
Code (Hex): 11 — read
Code (Hex): 91 — write
Table 53: HcLSThreshold register: bit allocation
Bit
31
30
29
Symbol
Reset
-
-
-
Access
-
-
-
Bit
23
22
21
Symbol
Reset
-
-
-
Access
-
-
-
Bit
15
14
13
Symbol
reserved
Reset
-
-
-
Access
-
-
-
Bit
7
6
5
Symbol
Reset
0
0
1
Access
R/W
R/W
R/W
28
27
reserved
-
-
-
-
20
19
reserved
-
-
-
-
12
11
-
-
-
-
4
3
LST[7:0]
0
1
R/W
R/W
26
25
24
-
-
-
-
-
-
18
17
16
-
-
-
-
-
-
10
9
8
LST[10:8]
1
1
0
R/W
R/W
R/W
2
1
0
0
0
0
R/W
R/W
R/W
9397 750 12337
Product data
Table 54:
Bit
31 to 11
10 to 0
HcLSThreshold register: bit description
Symbol Description
−
reserved
LST[10:0]
LSThreshold: Contains a value that is compared to the
FrameRemaining (FR) field before a low-speed transaction is
initiated. The transaction is started only if FrameRemaining
(FR) ≥ this field. The value is calculated by the HCD, which
considers transmission and set-up overhead.
Rev. 03 — 06 January 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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