HS_USB2.0 host
RM0082
422/844
Doc ID 018672 Rev 1
[19:17]
Reserved
-
Read: undefined.
[16]
P_INDICATOR
1‘h0
Port indicators.
This bit indicates whether the ports support port
indicator control. When this bit is set, each port status
control register (PORTSC) of auxiliary power well
includes a specific RW field (PIC, port indicator
control) for controlling the state of the port indicator.
[15:12]
N_CC
4‘h1
Number of companion controllers.
This field indicates the number of companion OHCI
host controllers (USB 1.1) associated with the EHCI
host controller (USB 2.0). A zero value in this field
indicates that there are no companion OHCI host
Controllers, whereas a non-zero value indicates that
there are as many companion OHCI host controllers
(default is 1).
[11:08]
N_PCC
4‘h1
Number of ports per companion controller.
This field indicates the number of ports supported per
each companion OHCI host controller. It is used to
indicate the port routing configuration to system
software. The default convention (bit PRR set to 0b0)
is that the first N_PCC ports are assumed to be
routed to companion controller #1, the next N_PCC
ports to companion controller #2, and so on.
Note: The number in this field must be consistent with
both N_PORTS and N_CC.
[07]
PRR
1‘h0
Port routing rules.
This field indicates the port routing method which
drives how all ports are mapped to companion
controllers, according to encoding:
1‘b0 = The first N_PCC ports are routed to the lowest
numbered function companion OHCI host controller,
the next N_PCC port are routed to the next lowest
function companion controller, and so on.
1‘b1 = The port routing is explicitly enumerated by the
first N_PORTS elements of the HCSP-PORTROUTE
array (in the capability registers). In the device, just
one single port is present for each controller, so this
information is actually irrelevant.
[06:05]
Reserved
-
Read: undefined.
Table 352.
HCSPARAMS register bit assignments (continued)
Bit
Name
Reset value Description