參數(shù)資料
型號: RG82845MP
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): 134/157頁
文件大小: 1407K
代理商: RG82845MP
Intel
82845MP/82845MZ Chipset-Mobile (MCH-M)
78
Datasheet
250687-002
R
3.7.32.
LPTT – AGP Low Priority Transaction Timer Register – Device
#0
Address Offset:
BDh
Default Value:
00h
Access:
Read/Write, Read Only
Size:
8 bits
LPTT is an 8-bit register similar in a function to AMTT. This register is used to control the minimum
tenure on the AGP for low priority data transaction (both reads and writes) issued using PIPE# or SBA
mechanisms.
The number of clocks programmed in the LPTT represents the guaranteed time slice (measured in 66
MHz clocks) allotted to the current low priority AGP transaction data transfer state. This does not
necessarily apply to a single transaction, but can span multiple low-priority transactions of the same type.
After this time expires the AGP arbiter may grant the bus to another agent if there is a pending request.
The LPTT does not apply in the case of high-priority request where ownership is transferred directly to
high-priority requesting queue. The default value of LPTT is 00h and disables this function. The LPTT
value can be programmed with 8-clock granularity. For example, if the LPTT is programmed to 10h,
then the selected value corresponds to the time period of 16 AGP (66 MHz) clocks.
Bit
Description
7:3
Low Priority Transaction Timer Count Value (LPTTC): The number of clocks programmed in these
bits represents the guaranteed time slice (measured in eight 66-MHz clock granularity) allotted to the
current low priority AGP transaction data transfer state.
2:0
Reserved
相關(guān)PDF資料
PDF描述
RG82845MZ Controller Miscellaneous - Datasheet Reference
RG82870P2 Controller Miscellaneous - Datasheet Reference
RH5RE36AA-T1-FA 3.6 V FIXED POSITIVE LDO REGULATOR, 0.7 V DROPOUT, PSSO3
RH5RE56AA-T1-FA 5.6 V FIXED POSITIVE LDO REGULATOR, 0.7 V DROPOUT, PSSO3
RE5RE36AA-TZ-FC 3.6 V FIXED POSITIVE LDO REGULATOR, 0.7 V DROPOUT, PBCY3
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RG82845MP S L66J 制造商:Intel 功能描述:Chipset Memory Controller Hub Mobile 593-Pin FCBGA
RG82845MZ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Controller Miscellaneous - Datasheet Reference
RG82845PE S L6H5 制造商:Intel 功能描述:CHIPSTGMCH 82845PE HT-PBGA760
RG82845PESL6Q3 制造商:Intel 功能描述:Chipsets
RG82845-SL5V7 制造商:Intel 功能描述:INTEL 845G GRAPHICS AND MEMORY CONTROLLER HUB(GMCH)