HYB18H256321BF QIMONDA [Qimonda AG], HYB18H256321BF Datasheet - Page 18

• Manufacturer Part Number: HYB18H256321BF
• Description: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
• Manufacturer: QIMONDA [Qimonda AG]

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
4. If the user activates bits in the extended mode register in
Rev. 0.80, 2007-09
09132007-07EM-7OYI
device.
an optional field, either the optional field is activated (if
Command
CLK#
CLK
PA
NOP
t
RP
Extended Mode Register Bitmap for High-Speed Application
EMRS
18
5. WR (write recovery time for auto precharge) in clock
A.C.:
option implemented in the device) or no action is taken by
the device (if option not implemented).
cycles is calculated by dividing
to the next integer (WR[cycles] =
mode register must be programmed to this value.
Don't Care
NOP
Any command
Extended Mode Register Set Timing
t
MRD
EMRS: Extended MRS command
PA:
PREALL command
NOP
t
WR
t
(in ns) and rounding up
WR
A.C.
Internet Data Sheet
HYB18H256321BF
[ns] /
256-Mbit GDDR3
FIGURE 8
FIGURE 9
t
CK
[ns]). The