參數(shù)資料
型號： 82815EM
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 62/163頁
文件大?。?/td> 1049K
代理商： 82815EM
Intel
82815EM GMCH
R
62
Datasheet
3.6.23.
MISCC—Miscellaneous Control Register (Device 0)
Address Offset:
72-73h
Default Value:
0000h
Access:
Read/Write, Read Only
Size:
16 bits
This register holds all of the miscellaneous control bits for GMCH2-M.
15
8
Reserved
7
6
5
4
3
2
1
0
Read PWR Throttle Cntl
Write PWR Throttle Cntl
Throttle
Lock
Reserved
BNR
Looka
head
GFX Tr
Win Size
Sel
Bit
Description
15:8
Reserved.
7:6
Read Power Throttle Control. Read/Write,RO if Throttle Lock (bit 3=1). These bits are locked
(RO) when bit 3 (Throttle Lock) is set to 1.
These bits select the Power Throttle Bandwidth Limits for
Read operations to System Memory.
00 = No Limit (800 MB/Sec) (Default Value)
01 = Limit at 87 % (700 MB/Sec)
10 = Limit at 75 % (600 MB/Sec)
11 = Limit at 62 % (500 MB/Sec)
5:4
Write Power Throttle Control. Read/Write,RO if Throttle Lock (bit 3=1). These bits are locked
(RO) when bit 3 (Throttle Lock) is set to 1.
These bits select the Power Throttle Bandwidth Limits for
Write operations to System Memory.
00 = No Limit (800 MB/Sec) (Default Value)
01 = Limit at 62 % ( 500 MB/Sec)
10 = Limit at 50 % ( 400 MB/Sec)
11 = Limit at 37 % ( 300 MB/Sec)
3
Throttle Lock
.
Read/Write, RO if Throttle Lock (bit 3 =1). Once this bit is set, it can only be
cleared by a reset.
0 = Bits [7:3] remain writeable
1 = Block writes to bits [7:3]
2
Reserved
(RO)
1
BNR Lookahead (Read/Write).
This enables the HT unit to look further up the data path in order to
optimize the BNR (Block New Requests) signal in order to increase our effective IOQ (In Order Queue)
depth.
0 = Normal Behavior (default)
1 = BNR Lookahead Enable
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