SH7785 Datasheet, PDF (614/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

13. PCI Controller (PCIC)
(25) PCI Power Management Register (PCIPMC)
PCIPMC is a 16-bit register that provides information on the functions related to power
management. For details, see section 3, PCI Power Management Interface in PCI Bus Power
Management Interface Specification Revision 1.1. This register is not cleared by a power-on reset.
This register must be set during initialization of register initialization in the PCIC (CFINIT = 0 in
PCICR).
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
PMCS
D2S D1S ⎯ ⎯ ⎯ DSI ⎯ PMEC
PMV
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
SH R/W: R R R R R R/W R/W R R R R R R/W R/W R/W R/W
PCI R/W: R R R R R R R R R R R R R R R R
Initial
Bit
Bit Name Value R/W
15 to 11 PMCS
00000 SH: R
PCI: R
10
D2S
0
SH: R/W
PCI: R
9
D1S
0
SH: R/W
PCI: R
Description
PME SUPPORT
This 5-bit field indicates the power state that asserts
PME, by using this power management function.
When these bits are 0, these bits indicate that this
function cannot assert PME at that power state (not
supported).
(Bit11) xxxx1: PME can be asserted from D0
(Bit12) xxx1x: PME can be asserted from D1
(Bit13) xx1xx: PME can be asserted from D2
(Bit14) x1xxx: PME can be asserted from D3hot
(Bit15) 1xxxx: PME can be asserted from D3cold
Note: The PCIC in this LSI dose not have the PME
pin.
D2 Support
When this bit is 1, this power management function
supports the D2 power management state. When the
D2 power management state is not supported, this bit
should always be read as 0.
D1 Support
When this bit is 1, This function supports the D1
power management state. When the D1 power
management state is not supported, this bit is read as
0.
Rev.1.00 Jan. 10, 2008 Page 584 of 1658
REJ09B0261-0100