P2G Status Register (P2Gstatus) 0Xd094 - Toshiba TMPR4937 Manual

10.4.20 P2G Status Register (P2GSTATUS)
31
Reserved
15
Bit Mnemonic Field Name
31:25 Reserved
PM State Change
24 PMSC
Detected
23 PMEES PME_En Set
Detected
22 PMECLR PME Status Clear
Detected
21 M66EN 66 MHz Drive
Status
20 IOBFE Initiator Out-
Bound FIFO
Empty
19 IIBFE Initiator In-Bound
FIFO Empty
18 TOBFE Target Out-Bound
FIFO Empty
17 TIBFE Target In-Bound
FIFO Empty
16:0 Reserved
25 24 23 22
PMSC
PMEES
PMECLR
R/W1C R/W1C R/W1C
0x0 0x0 0x0
Reserved
Description
Power Management State Change (Default: 0x0)
"1" is set to this bit when the PowerState field of the Power Management
Register (PMCSR) is rewritten.
This bit is cleared to "0" when a "1" is written to it. This bit is only valid when
the PCI Controller is in the Satellite mode.
PME_En Set (Default: 0x0)
This bit is set to "1" when the PME_En bit of the PMCSR Register is set to
"1". When this bit is set, it indicates that the PCI Master (Host) device
enabled PME* signal output.
1: Indicates that the PME_En bit is set.
0: Indicates that the PME_En bit is not set.
This bit is cleared to "0" when a "1" is written to it. This bit is only valid when
the PCI Controller is in the Satellite mode.
PME_Status Clear (Default: 0x0)
This bit indicates that the PME_Status bit of the PMCSR Register was
cleared.
1: Indicates that the PME_Status bit was cleared.
0: Indicates that the PME_Status bit was not cleared.
This bit is cleared to "0" when a "1" is written to it. This bit is only valid when
the PCI Controller is in the Satellite mode.
M66EN Status (Default: 0x0)
This bit indicates the current status of the M66EN signal. This bit can only
be read. Writes to this bit are invalid.
1: The M66EN signal is asserted.
0: The M66EN signal is deasserted.
Initiator Out-Bound FIFO Empty (Default: 0x1)
1: Indicates that the Initiator Out-Bound FIFO is empty.
0: Indicates that the Initiator Out-Bound FIFO is not empty.
This is a diagnostic function.
Initiator In-Bound FIFO Empty (Default: 0x1)
1: Indicates that the Initiator In-Bound FIFO is empty.
0: Indicates that the Initiator In-Bound FIFO is not empty.
This is a diagnostic function.
Target Out-Bound FIFO Empty (Default: 0x1)
1: Indicates that the Target Out-Bound FIFO is empty.
0: Indicates that the Target Out-Bound FIFO is not empty.
This is a diagnostic function.
Target In-Bound FIFO Empty (Default: 0x1)
1: Indicates that the Target In-Bound FIFO is empty.
0: Indicates that the Target In-Bound FIFO is not empty.
This is a diagnostic function.
Figure 10.4.18 P2G Status Reigster
10-46
Chapter 10 PCI Controller
0xD094
21 20 19 18
M66EN IOBFE IIBFE TOBFE TIBFE
R R R R
0x0 0x1 0x1 0x1
17 16
Reserved
R : Type
0x1 : Initial value
0
: Type
: Initial value
Read/Write
⎯
R/W1C
R/W1C
R/W1C
R
R
R
R
R
⎯