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1GB-AUTO-AS4C128M8D3 Datasheet, PDF (80/84 Pages) Alliance Semiconductor Corporation – Fully synchronous operation
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1Gb Auto-AS4C128M8D3
Figure 70. Dynamic ODT: Behavior with ODT pin being asserted together with write
command for a duration of 6 clock cycles, example for BC4
(via MRS or OTF), AL = 0, CWL = 5.
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
CK#
CK
COMMAND
ADDRESS
ODT
RTT
DQS, DQS#
DQ
NOP
WRS4
NOP
NOP
NOP
NOP
VALID
ODTLcnw
ODTH4
ODTLon
tAON(min)
ODTLcwn4
tADC(max)
NOP
NOP
RTT_WR
NOP
NOP
NOP
NOP
ODTLoff
tADC(min)
tADC(max)
tAOF(min)
RTT_NOM
tAOF(max)
WL
Din
Din
Din
Din
n
n+1
n+2
n+3
NOTES:
1. ODTH4 is defined from ODT registered high to ODT registered low, so in this example, ODTH4 is satisfied. TRANSITIONING DONņ T CARE
2. ODT registered low at T5 would also be legal.
TRANSITIONING DATA
Don't Care
Figure 71. Dynamic ODT: Behavior with ODT pin being asserted together with write
command for a duration of 4 clock cycles
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
CK#
CK
COMMAND
NOP
WRS4
NOP
NOP
NOP
NOP
ADDRESS
ODT
RTT
VALID
ODTLcnw
ODTH4
ODTLon
tAON(min)
ODTLcwn4
tADC(max)
DQS, DQS#
WL
DQ
NOP
NOP
NOP
NOP
ODTLoff
RTT_WR
tAOF(min)
tAOF(max)
Din
Din
Din
Din
n
n+1
n+2
n+3
NOP
NOP
NOTES:
Example for BC4 (via MRS or OTF), AL = 0, CWL = 5. In this example, ODTH4 = 4 is exactly satisfied.
TRANSITIONING DATA
Don't Care
Confidential
-80-
Rev.1.0 May 2015
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