SH7760 Datasheet, PDF (791/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

Bit
Bit Name Initial Value R/W Description
11
OCPM
0
R/W Overcurrent Protection Mode
This bit specifies the overcurrent condition reporting
method for root hub ports. At reset, this bit should
reflect the same mode as in PSM. This bit is valid
only when the NOCP bit is cleared to 0.
0: Overcurrent status info is collected for all ports
1: Overcurrent status info is collected for ports
individually
Note: There are restrictions on this bit. For details,
see section 21.6, Restrictions on
HcRhDescriptorA.
10
DT
1
R
Device Type
This bit specifies that the root hub is not a
compound device. Always write 0 to this bit.
0: Root hub is not a compound device
1: Setting prohibited
9
NPS
1
R/W No Power Switching
This bit selects whether ports are power switched or
ports are always powered. It is implementation
specific. When this bit is cleared to 0, the PSM bit
specifies global or per-port switching.
0: Ports are power switched
1: Ports are always powered on when HC is
powered on
Note: Since the initial value is 1, this bit should be
cleared to 0 in advance (0 is written by HCD)
to enable power switching.
Rev. 1.0, 02/03, page 741 of 1294