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M2S56D20AKT

256M Double Data Rate Synchronous DRAM

Mitsumi 

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

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