IS43R16320B
IC43R16320B
Mode Register and Extended Mode Register Set
There are two mode registers, the mode register and the extended mode register so as to define the operating
mode. Parameters are set to both through the A0 to the A12 and BA0, BA1 pins by the mode register set command
[MRS] or the extended mode register set command [EMRS]. The mode register and the extended mode register are
set by inputting signal via the A0 to the A12 and BA0, BA1 during mode register set cycles. BA0 and BA1 determine
which one of the mode register or the extended mode register are set. Prior to a read or a write operation, the mode
register must be set.
Remind that no other parameters shown in the table bellow are allowed to input to the registers.
BA0 BA1 A12 A11 A10 A9 A8 A7 A6 A5 A4
DR LMODE
A3
BT
A2 A1
BL
A0
0
0
0
0
0
0
0
MRS
A6 A5 A4 CAS Latency
A8 DLL Reset
A3 Burst Type
A2 A1 A0 Burst Length
0
0
0
Reserved
0
1
No
0
1
Sequential
Interleave
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Reserved
2
0
0
0
1
1
0
Reserved
2
Yes
4
0
1
1
0
1
0
3
8
Reserved
Reserved
Reserved
Reserved
Reserved
1
1
1
0
1
1
1
0
1
Reserved
2.5
Reserved
Mode Register Set [MRS] (BA0 = 0, BA1 = 0)
BA0 BA1 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
1
0
0
0
0
0
0
0
0
0
0
0
0
DS DLL
EMRS
A0 DLL Control
A1 Driver Strength
0
1
DLL Enable
DLL Disable
0
1
Normal
Weak
Extended Mode Register Set [EMRS] (BA0 = 1, BA1 = 0)
Integrated Silicon Solution, Inc. — www.issi.com
23
Rev. 00B
06/11/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
