DDR SDRAM (Rev.1.0)
Jul. '01 Preliminary
MITSUBISHI LSIs
M2S56D20/ 30/ 40AKT
256M Double Data Rate Synchronous DRAM
EXTENDED MODE REGISTER
DLL disable / enable mode can be programmed by setting the extended
mode register (EMRS). The extended mode register stores these data
until the next EMRS command, which may be issued when all banks are
in idle state. After tMRD from a EMRS command, the DDR SDRAM is
ready for new command.
CLK
/CLK
/CS
/RAS
/CAS
/WE
BA1 BA0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
BA0
0 1 0 0 0 0 0 0 0 0 0 0 0 DS DD
BA1
A11 -A0
V
0 DLL Enable
DLL Disable
1 DLL Disable
Drive
0
Strength
1
Normal
Weak
MITSUBISHI ELECTRIC
14