Freescale Semiconductor MCF52277 Reference Manual page 372

Universal Serial Bus Interface – On-The-Go Module
20.3.3.3 Host Controller Structural Parameters Register (HCSPARAMS)
This register contains structural parameters such as the number of downstream ports.
the HCSPARAMS register.
Address: 0xFC0B_0104 (HCSPARAMS)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
R 0 0 0 0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 20-12. Host Controller Structural Parameters Register (HCSPARAMS)
Field
31–28 Reserved, always cleared.
27–24 Number of transaction translators. Non-EHCI field. Indicates number of embedded transaction translators
N_TT associated with host controller. This field is always 0x0.
See Section 20.5.5.1, "Embedded Transaction Translator
transaction translators.
23–20 Ports per transaction translator. Non-EHCI field. Indicates number of ports assigned to each transaction
N_PTT translator within host controller.
19–17 Reserved, always cleared.
16 Port indicators. Indicates whether the ports support port indicator control. Always cleared .
PI 0 No port indicator fields.
1 The port status and control registers include a R/W field for controlling the state of the port indicator. See
Table 20-3
15–12 Number of companion controllers. Indicates number of companion controllers associated with USB OTG
N_CC controller. Always cleared.
11–8 Number ports per CC. Indicates number of ports supported per internal companion controller. This field is 0
N_PCC because no companion controllers are present.
7–5 Reserved, always cleared.
4 Power port control. Indicates whether host controller supports port power control. Always set.
PPC 1 Ports have power port switches.
3–0 Number of ports. Indicates number of physical downstream ports implemented for host applications. Field value
N_PORTS determines how many addressable port registers in the operational register. For the USB OTG module, this is
always 0x1.
20-14
N_TT N_PTT 0 0 0
Table 20-15. HCSPARAMS Field Descriptions
for more information.
MCF52277 Reference Manual, Rev. 1
16 15 14 13 12 11 10 9
PI N_CC N_PCC
0 0 0 0 0 0 0 0 0 0 0 0
Description
Function," for more information on embedded
Figure 20-12 shows
Access: User read-only
8 7 6 5 4 3 2
0 0 0 PPC N_PORTS
1 0 0 0 1
Freescale Semiconductor
1 0