HYB18M1G320BF Datasheet, PDF (19/62 Pages) Qimonda AG – DRAMs for Mobile Applications 1-Gbit x32 DDR Mobile-RAM

Data Sheet
2.4.3
MODE REGISTER SET
The Mode Register and Extended Mode Register are loaded
via inputs A0 - A12 (see mode register descriptions in
Chapter 2.2). The MODE REGISTER SET command can
only be issued when all banks are idle and no bursts are in
progress. A subsequent executable command cannot be
issued until t_MRD is met.
HY[B/E]18M1G320BF
1-Gbit DDR Mobile-RAM
FIGURE 7
Mode Register Set Command
CK
CK
CKE
CS
RAS
CAS
WE
A0-A12
BA0,BA1
(High)
Code
Code
= Don't Care
CK
CK
Command
MRS
Address
Code
NOP
t_MRD
FIGURE 8
Mode Register Definition
Valid
Valid
= Don't Care
Code = Mode Register / Extended Mode Register selection
(BA0, BA1) and op-code (A0 - A12)
Parameter
MODE REGISTER SET command period
TABLE 9
Timing Parameters for Mode Register Set Command
Symbol
- 7.5
Unit Note
t_MRD
min. max.
2
–
t_CK
–
Rev.1.00, 2007-03
19
02022006-J7N7-GYFP