HYB18H512321BF Datasheet, PDF (19/43 Pages) Qimonda AG – 512-Mbit GDDR3 Graphics RAM

Internet Data Sheet
HYB18H512321BF
512-Mbit GDDR3
FIGURE 7
Extended Mode Register Bitmap for Mid-Range-Speed Application
BA2 BA1 BA0 A11 A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
0
0
1
0
V
RFU
WR DLL
WR
A10 Vendor ID
0
Off
1
On
A6 ^DLL
Enable
0 Enable
1 Disable
A7 A5 A4
WR
00 0
11
00
1
4
01
0
5
01
1
6
10
0
7
10
1
8
11
0
9
11
1
10
Rtt
Data Z
A1 A0 ^{Output Driver}
Impedance
0
0
0
1
1
0
1
1
Autocal
35
40
45
A3 A2 Termination
0 0 ODT disabled
01
RFU
10
ZQ / 4
11
ZQ / 2
(Default) ²⁾
There are two bitmaps for the Extended Mode Register. One bitmap shown in Figure 7 is supposed to support Mid-Speed
applications. The other bitmap shown in Figure 8 is more focused on the high-range-speed application. Both bitmaps
distinguish different numbers in supported Write Recovery clock cycles. The mid-range bit map provides WR cycles from 4 to
11.The high-speed bitmap supports WR from 7 to 13.
FIGURE 8
Extended Mode Register Bitmap for High-Speed Application





















 

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Rev. 1.1, 2007-09
19
05292007-WAU2-UU95