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CHAPTER 7 PCI CONTROLLER
Preliminary User’s Manual S15543EJ1V0UM
409
7.5.19.19 Max_Lat register
This register specifies how often the device needs to get the PCI bus usage.
R/WBits Field
Internal
bus
PCI
Default Description
7:0 Max_Lat R/W R 0 The value should be set by the V
R
4120A.
7.5.19.20 Cap_ID register
This register indicates what kind of data structure of the capability is pointed to. The value ‘01H’ means that the
data structure is for the PCI Power Management.
R/WBits Field
Internal
bus
PCI
Default Description
7:0 Cap_ID R R 01H Hardwired to ‘01H’, that identifies the linked list item as being the
PCI Power Management registers.
7.5.19.21 Next_Item_Ptr register
This register points the next item in the capabilities list. NULL means that this item is the last one in the list.
R/WBits Field
Internal
bus
PCI
Default Description
7:0 Next_Item_Ptr R R 0 Hardwired to ‘00H’, because the PPMI function is the last item in
the capabilities list for The PCI Controller.
7.5.19.22 PMC register
The Power Management Capabilities register provides information on the capabilities of the function related to
power management.
R/WBits Field
Internal
bus
PCI
Default Description
15:11 PME_Support R/W R 0 The V
R
4120A should set the bits of the power state in which the
chip supports PME_B assertion.
10 D2_Support R R 0 Hardwired to a ‘0’, because the PCI Controller does not support
D2 state.
9 D1_Support R/W R 0 If the chip supports D1 state, this bit should be set by the
V
R
4120A.
8:6 Aux_Current R R 000 Hardwired to ‘000’, because the PCI Controller does not support
PME# from D3cold state.
5 DSI R R 0 Hardwired to a ‘0’, because the PCI Controller does not require
the special initialization.
4 Reserved R R 0 Hardwired to a ‘0’.
3 PME Clock R/W R 0 Indicating Whether PCI clock is required or not, in order to
generate PME_B. PME_B is generated using an 66MHz internal
clock. The V
R
4120A must set a ‘1’ to this bit.
2:0 Version R R 010 Hardwired to ‘010’, which indicates that the PCI Controller
complies with Revision 1.1 of the PPMI.