CMS4A16LAx–75Ex
Table 5. Extended Mode Register Table[11.12.]
.
A6
A5
Driver Strength
Self Refresh Coverage
A7
A2
A1
A0
0
0
1
1
0
1
0
1
100%
75%
50%
25%
Four Banks
0
0
0
0
0
0
1
0
1
0
Two Banks (Bank0 & 1)
One Bank (Bank 0)
0
1
0
0
0
0
1
1
X
0
0
1
1
X
1
X
0
1
0
1
X
RFU
RFU
1
Four Banks
Two Banks (Bank2 & 3)
One Bank (Bank2)
RFU
RFU
Note :
11. EM13 and EM12 (BA1 and BA0) must be “1, 0” to select the Extended Mode Register(vs. the base Mode Register).
12. RFU: Reserved for Future Use
Table 6. Commands[13.14.15.16.17.18.19.20.]
.
CKE
Name(Function)
/CS
/RAS /CAS /WE DQM ADDR
DQ
X
H
COMMAND INHIBIT(NOP)
NO OPERATION(NOP)
H
L
X
H
X
H
X
H
X
X
X
X
X
X
Bank/
Row
ACTIVE(Select bank and activate row)[15.]
L
L
L
L
H
H
H
L
L
H
H
L
X
X
X
H
H
H
Bank/
Col
READ(Select bank and column, and start READ burst)[16.]
WRITE(Select bank and column, and start WRITE burst)[16.]
L/H
L/H
Bank/
Col
Valid
BURST TERMINATE
L
L
L
L
-
H
L
L
L
-
H
H
L
L
-
L
L
H
L
-
X
X
X
X
L
X
Code
X
Active
H
H
H
H
H
H
L
PRECHARGE(Deactivate row in bank or banks)[17.]
AUTO REFRESH or SELF REFRESH(Enter Self Refresh Mode) )[18. 19.]
LOAD MODE REGISTER)[14.]
X
X
Opcode
-
X
Write Enable/Output Enable)[20.]
Active
High Z
X
Write Inhibit/Output High-Z)[20.]
-
-
-
-
H
X
Deep Power Down(Enter DPD Mode)
L
H
H
L
X
12
Rev. 0.5, May. ‘07
FIDELIX [ FIDELIX ]
