Data Sheet
HY[B/E]18M1G16[0/1]BF
1-Gbit DDR Mobile-RAM
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 tMRD is met.
FIGURE 8
Mode Register Set Command
CK
CK
CKE
(High)
CS
RAS
CAS
WE
A0-A12
BA0,BA1
Code
Code
= Don't Care
FIGURE 9
Mode Register Definition
CK
CK
Command
MRS
Code
NOP
tMRD
Valid
Valid
Address
= Don't Care
Code = Mode Register / Extended Mode Register selection
(BA0, BA1) and op-code (A0 - A12)
TABLE 9
Timing Parameters for Mode Register Set Command
Parameter
Symbol
- 6
- 7.5
Unit Note
min.
max.
min. max.
MODE REGISTER SET command period
tMRD
2
–
2
–
tCK
–
Rev.1.0, 2007-03
20
10242006-Y557-TZXW
QIMONDA [ QIMONDA AG ]
