Sundance Technology
ST201
PRELIMINARY draft 2
CONFIGPARM |
|
Class | EEPROM Data Format |
Base Address | 0x00, address written to EepromCtrl register |
Address Offset | 0x00 |
Access Mode | Read Only |
Width | 16 bits |
This is loaded into the ST201 and controls various hardware functions related to PCI bus operation.
BIT
0
1
2
3
4
5
6
10..7
15..11
BIT NAME
FastBackToBack
Lower1Meg
DisableMemBase
D3ColdPme
D1Support
D2Support
PmeEn
MinGnt
MaxLat
BIT DESCRIPTION
Determines the value for the FastBackToBack bit in the ConfigStatus register.
Provides the value for MemMapType[0] in the MemBaseAddress regis- ter.
When set, disables the MemBaseAddr register. This bit causes Mem- BaseAddr to read back as zeroes, appearing as if it is not implemented by the adapter.
Provides the value returned in bit 15 of the PowerMgmtCap register. This bit, when set, indicates that the adapter is capable of signaling wake from the D3cold state.
Provides the value returned in D1Support and also bit 12 in the Power- MgmtCap register.
Provides the value returned in D2Support and also bit 13 in the Power- MgmtCap register.
When this bit is set, the ST201 is allowed to report wake events on the PMEN signal.
Determines the value returned in bits [4..1] of the MinGnt register.
Determines the value returned in bits [5..1] of the MaxLat register.
ConfigParm has a default value of 2ab0h, but is normally overwritten by the value in EEPROM. The default values specify:
FastBackToBack = 0
Lower1Meg = 0
DisableMemBase = 0
D3ColdPme = 0
D1Support = 1
D2Support = 1
PmeEn = 0
MinGnt = 0101b (2.5 us)
MaxLat = 00101b (2.5 us).
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