QG82945GSE S LB2R Intel, QG82945GSE S LB2R Datasheet - Page 127
QG82945GSE S LB2R
Manufacturer Part Number
QG82945GSE S LB2R
Description
GRAPHICS AND MEM CNTRL HUB; No. of Pins: 998; Package / Case: FCBGA; Interface Type: PCI, SATA, USB
Manufacturer
Intel
Datasheet
1.AU80586GE025DSLB73.pdf
(482 pages)
- Current page: 127 of 482
- Download datasheet (4Mb)
Device 0 Memory Mapped I/O Register
Datasheet
21:20
19:18
17:17
Bit
Access
R/W
R/W
RO
Default
Value
10b
00b
0b
Back-to-Back Read-Write Command Spacing:
This field determines the number of turnaround clocks between
the read command and a subsequent write command.
The minimum spacing of commands is calculated based on the
formula:
DDR2 = BL/2 + TA + 1
(
This is derived as follows:
DDR2 = CL + BL/2 + TA (wr-rd) - WL
DDR2 = CL + BL/2 + TA - CL + 1
)
BL is the burst length and is set to 8
TA is the required read to write DQ turnaround on the bus. Can
be set to 1,2,3, 4 CK
CL is CAS Latency
The bigger turnarounds are used in large configurations, where
the difference in total channel delay between the fastest and
slowest DIMM is large.
Back-to-Back Write Command Spacing:
This field controls the turnaround time on the DQ bus for WR-
WR sequence to different ranks in one channel.
The minimum spacing of commands is calculated based on the
formula
DDR2 = BL/2 + TA
Encoding
00
01
10
11
The bigger turnarounds are used in large configurations, where
the difference in total channel delay between the fastest and
slowest DIMM is large.
Reserved
Encoding
00
01
10
11
(Sheet 3 of 4)
2 turnaround clocks on DQ
1 turnaround clocks on DQ
0 turnaround clocks on DQ
Reserved
Turnaround
BL4 CMD
Spacing
7
6
5
4
Description
BL8 CMD
Spacing
9
8
7
6
6
5
4
BL8 CMD Spacing
127
Related parts for QG82945GSE S LB2R
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Microprocessor: Intel Celeron M Processor 320 and Ultra Low Voltage Intel Celeron M Processor at 600MHz
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 82550 Fast Ethernet Multifunction PCI/CardBus Controller
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 64 Mbit. Access speed 150 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 100 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
DA28F640J5A-1505 Volt Intel StrataFlash Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 6300ESB I/O Controller Hub
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel 82801DB I/O Controller Hub (ICH4), Pb-Free SLI
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel 82801FB I/O Controller Hub (ICH6)
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel Strataflash Memory28F128J3 28F640J3 28F320J3
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Controllers, Intel 430TX PCIset: 82439TX System Controller (MTXC)
Manufacturer:
Intel Corporation