r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 618

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

13. PCI Controller (PCIC)
(27) PCIPMCSR Bridge Support Extension Register (PCIPMCSRBSE)
This register supports the functions specific to the PCI bridge and is required for all PCI-to-PCI
bridges.
Rev.1.00 Jan. 10, 2008 Page 588 of 1658
REJ09B0261-0100
Bit
7
6
5 to 0
Bit Name
BPCCEN
B2B3N
⎯
Initial value:
Initial
Value
0
0
All 0
PCI R/W:
SH R/W:
Bit:
R/W
SH: R
PCI: R
SH: R
PCI: R
SH: R
PCI: R
BPC
CEN
R
R
7
0
B2B3N
R
R
6
0
Description
When the bus power/clock control mechanism is
disabled, the system software does not use the power
state field in PCI_PMCSR of the bridge to control the
power or clock of the secondary bus of the bridge.
The state of this bit determines the action to be taken
as a result of programming that sets the power
management function to the D3 hot state.
0: Indicates that the power supplied to the secondary
1: Indicates that the PCI clock of the secondary bus
This bit is valid only when bit 7 (PCI_BPCCEN) is set
to 1.
Reserved
These bits are always read as 0. The write value
should always be 0.
—
R
R
5
0
will be stopped (B3) when the bridge function is set
to the D3 hot state.
will be stopped (B2) when the bridge function is set
to the D3 hot state.
—
R
R
4
0
—
R
R
3
0
—
R
R
2
0
—
R
R
1
0
—
R
R
0
0