參數(shù)資料
型號: HYB18H256321BF-12
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
中文描述: 8M X 32 SYNCHRONOUS GRAPHICS RAM MODULE, 0.22 ns, PBGA136
封裝: GREEN, PLASTIC, TFBGA-136
文件頁數(shù): 18/41頁
文件大?。?/td> 1302K
代理商: HYB18H256321BF-12
HYB18H256321BF
256-Mbit GDDR3
Internet Data Sheet
Rev. 0.80, 2007-09
09132007-07EM-7OYI
18
FIGURE 8
Extended Mode Register Bitmap for High-Speed Application
Notes
1. These settings are for debugging purposes only.
2. Default termination values at Power Up.
3. The ODT disable function disables all terminators on the
device.
4. If the user activates bits in the extended mode register in
an optional field, either the optional field is activated (if
option implemented in the device) or no action is taken by
the device (if option not implemented).
5. WR (write recovery time for auto precharge) in clock
cycles is calculated by dividing
t
WR
(in ns) and rounding up
to the next integer (WR[cycles] =
t
WR
[ns] /
t
CK
[ns]). The
mode register must be programmed to this value.
FIGURE 9
Extended Mode Register Set Timing
'DWD=
%$
%$
$
$
$
$
$
$
$
$
$
$
$
$
'//
9
5)8
:5
5WW
$
$
2'7GLVDEOHG
5)8
7HUPLQDWLRQ
=4
=4
'HIDXOW
2XWSXW'ULYHU
,PSHGDQFH
$XWRFDO
2KPV
2KPV
2KPV
$
$
:5
5)8
$
$
$
9HQGRU,'
2Q
2II
$
'//
(QDEOH
(QDEOH
'LVDEOH
$
:5
CLK#
CLK
Don't Care
PA
EMRS
NOP
A.C.
NOP
t
RP
t
MRD
Command
EMRS: Extended MRS command
PA: PREALL command
A.C.: Any command
NOP
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