ESMT
M14D5121632A (2H)
Operation Temperature Condition (TC) -40°C~95°C
ODT (On Die Termination)
On Die Termination (ODT) is a feature that allows a DDR2 SDRAM to turn on/off termination resistance for each DQ, all
DQS/DQS , and all DM signals via the ODT control pin. The ODT feature is designed to improve signal integrity of the memory
channel by allowing the DRAM controller to independently turn on/off termination resistance for any or all devices.
The ODT function is supported for Active and Standby modes. ODT is turned off and not supported in Self Refresh mode.
Timing for ODT Update Delay
CLK
CLK
EMRS(1)
Command
ODT
NOP
t
AOFD
tIS
tMOD(max.)
tMOD(min.)
Internal
Rtt Setting
Old setting
Updating
New Setting
Note: tAOFD must be met before issuing EMRS(1) command. ODT must remain low for the entire duration of tMOD
window.
ODT Timing for Active and Standby Mode
T4
T5
T6
T1
T3
T2
T0
CLK
CLK
CKE
ODT
tIS
t
IS
t
AOFD
t
AOND
Internal
Term Res.
Rtt
t
AON(min.)
t
AON(max.)
t
AOF(min.)
t
AOF(max.)
Elite Semiconductor Memory Technology Inc.
Publication Date : Aug. 2011
Revision : 1.1 33/62
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
