SH7763 Datasheet, PDF (1548/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 35 USB Host Controller (USBH)
35.3.20 HcRhDescriptorB Register (USBHRDB) (Only one port is supported by this LSI.)
This register is only reset by a power-on reset. It is written during system initialization to
configure the Root Hub. These bits should not be written during normal operation.
Bit : 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
PPCM[15:0]
Initial value : 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit : 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
DR[15:0]
Initial value : 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit
Bit Name
31 to 16 PPCM
Initial value R/W
All 0
R/W
Description
PortPowerControlMask
USB Host Controller implements global-power
switching. These bits are only valid if
NoPowerSwitching is cleared and
PowerSwitchingMode bit is set (individual port
switching). When set, the port only responds to
individual port power switching commands
(Set/ClearPortPower). When cleared, the port only
responds to global power switching commands
(Set/ClearGlobalPower).
0: Device not removable
1: Global-power switching is masked
Port Bit relationship
0: Reserved
1: Port 1
2: Port 2
:
15: Port 15
Unimplemented ports are reserved. These bits are
always read as 0. The write value should always
be 0.
Rev. 1.00 Oct. 01, 2007 Page 1482 of 1956
REJ09B0256-0100