參數(shù)資料
型號: RG82870P2
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項-數(shù)據(jù)表參考
文件頁數(shù): 25/157頁
文件大小: 1407K
代理商: RG82870P2
Intel
82845MP/82845MZ Chipset-Mobile (MCH-M)
120
Datasheet
250687-002
R
Memory writes originating from the host or from the hub interface use the Fast Write protocol when it is
both capability enabled and enabled. The data rate used to perform the Fast Writes is dependent on the
bits set in the AGP Command Register bits 2:0 (DATA_RATE). If bit 2 of the
AGPCMD[DATA_RATE] field is 1, the data transfers occur using 4x strobing. If bit 1 of
AGPCMD[DATA_RATE] field is 1, the data transfers occur using 2x strobing. If bit 0 of
AGPCMD[DATA_RATE] field is 1, Fast Writes are disabled and data transfers occur using standard
PCI protocol. Note that only one of the three DATA_RATE bits may be set by initialization software.
This is summarized in the following table.
Table 30. Fast Write Initialization
FWEN
DATA_RATE
[2]
DATA_RATE
[1]
DATA_RATE
[0]
MCH-M =>AGP Master Write
Protocol
0
X
x
1x
1
0
1
1x
1
0
1
0
2x Strobing
1
0
4x Strobing
5.3.6.
AGP FRAME# Transactions on AGP
The MCH-M accepts and generates AGP FRAME# transactions on the AGP bus. The MCH-M
guarantees that AGP FRAME# accesses to DRAM are kept coherent with the processor caches by
generating snoops to the host bus. LOCK#, SERR#, and PERR# signals are not supported.
5.3.6.1.
MCH-M Target and Initiator Operations for AGP FRAME# Transactions
The following table summarizes MCH-M target operation for AGP FRAME# initiators. The only cycles
that will be claimed are memory accesses to main memory.
Table 31. PCI Commands Supported by the MCH-M When Acting as a FRAME# Target
MCH-M
PCI Command
C/BE[3:0]# Encoding
Cycle Destination
Response as aFRAME#
Target
Interrupt Acknowledge
0000
N/A
No Response
Special Cycle
0001
N/A
No Response
I/O Read
0010
N/A
No Response
I/O Write
0011
N/A
No Response
Reserved
0100
N/A
No Response
Reserved
0101
N/A
No Response
Memory Read
0110
Main Memory
Read
0110
The Hub interface
No Response
Memory Write
0111
Main Memory
Post Data
0111
The Hub interface
No Response
Reserved
1000
N/A
No Response
相關(guān)PDF資料
PDF描述
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
RE5RE36AC-TZ-FC 3.6 V FIXED POSITIVE LDO REGULATOR, 0.7 V DROPOUT, PBCY3
RE5RE56AA-TZ-FC 5.6 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
RG82870P2 S L675 制造商:Intel 功能描述:Interface, Dual-Channel Ddr200 Memory Interface For Up To 3.2 Gb/S Memory Bandwidth
RG82870P2 S L6SU 制造商:Intel 功能描述:INTERFACE, DUAL-CHANNEL DDR200 MEMORY INTERFACE FOR UP TO 3.2 GB/S MEMORY BANDWIDTH
RG82870P2 SL6SU 制造商:Intel 功能描述:
RG-8B-96-110V 制造商:TRUMETER COMPANY INC 功能描述:Power Factor Controller
RG-8BS-96-110V 制造商:TRUMETER COMPANY INC 功能描述:Power Factor Controller