Table 90: Synchronous ODT Parameters
Definition for All
DDR3 Speed Bins
Symbol
Description
Begins at
ODT registered HIGH
ODT registered HIGH
Defined to
RTT(ON) tAON
RTT(OFF) tAOF
Unit
tCK
tCK
tCK
ODTLon
ODT synchronous turn-on delay
CWL + AL - 2
CWL +AL - 2
4tCK
ODTLoff ODT synchronous turn-off delay
ODTH4
ODTH8
tAON
ODT minimum HIGH time after ODT ODT registered HIGH or write regis-
assertion or WRITE (BC4) tration with ODT HIGH
ODT registered LOW
ODT minimum HIGH time after WRITE Write registration with ODT HIGH
(BL8)
ODT registered LOW
RTT(ON)
6tCK
tCK
ps
ODT turn-on relative to ODTLon
completion
Completion of ODTLon
See Table 56
(page 79)
tAOF
ODT turn-off relative to ODTLoff
completion
Completion of ODTLoff
RTT(OFF)
0.5tCK 0.2tCK
tCK
Figure 115: Synchronous ODT
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
T14
T15
CK#
CK
CKE
AL = 3
AL = 3
CWL - 2
ODT
ODTH4 (MIN)
ODTLoff = CWL + AL - 2
ODTLon = CWL + AL - 2
t
t
AON (MIN)
t
AOF (MIN)
t
RTT,nom
RTT
AOF (MAX)
AON (MAX)
Transitioning
Don’t Care
1. AL = 3; CWL = 5; ODTLon = WL = 6.0; ODTLoff = WL - 2 = 6. RTT,nom is enabled.
Note:
MICRON [ MICRON TECHNOLOGY ]
