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GS82583EQ18GK-450 Datenblatt(PDF) 7 Page - GSI Technology

Teilenummer GS82583EQ18GK-450
Bauteilbeschribung  8Mb x 36 and 16Mb x 18 organizations available
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Hersteller  GSI [GSI Technology]
Direct Link  http://www.gsitechnology.com
Logo GSI - GSI Technology

GS82583EQ18GK-450 Datenblatt(HTML) 7 Page - GSI Technology

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GS82583EQ18/36GK-500/450/400
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Rev: 1.06 8/2017
7/26
© 2014, GSI Technology
DLL Operation
A DLL is implemented in these devices to control all output timing. It uses the CK input clock as a source, and is enabled when all
of the following conditions are met:
1. RST is de-asserted Low, and
2. The DLL pin is asserted High, and
3. CK cycle time
 tKHKH (max), as specified in the AC Timing Specifications section.
Once enabled, the DLL requires 64K stable clock cycles in order to lock/synchronize properly.
When the DLL is enabled, it aligns output clocks and read data to input clocks, and it generates all mid-cycle output timing. See the
Output Timing section for more information.
The DLL can tolerate changes in input clock frequency due to clock jitter (i.e. such jitter will not cause the DLL to lose lock/
synchronization), provided the cycle-to-cycle jitter does not exceed 200ps (see “tKJITcc” in the AC Timing Specifications section
for more information). However, the DLL must be resynchronized (i.e. disabled and then re-enabled) whenever the nominal input
clock frequency is changed.
The DLL is disabled when any of the following conditions are met:
1. RST is asserted High, or
2. The DLL pin is de-asserted Low, or
3. CK is stopped for at least 30ns, or CK cycle time
 30ns.
Clock Truth Table
SA
R
W
Current Operation
D
Q
CK
(tn)
CK
(tn+½)
CK
(tn)
CK
(tn)
(tn)
KD
(tn)
KD
(tn+½)
CQ
(tn+3)
CQ
(tn+3½)
X
X
1
1
NOP
X
X
0 / High-Z
X
V
1
0
Write Only
D1
D2
0 / High-Z
V
X
0
1
Read Only
X
X
Q1
Q2
V
V
0
0
Read + Write
D1
D2
Q1
Q2
Notes:
1. 1 = High; 0 = Low; V = Valid; X = don’t care.
2. D1 and D2 indicate the first and second pieces of Write Data transferred during Write operations.
3. Q1 and Q2 indicate the first and second pieces of Read Data transferred during Read operations.
4. When D ODT in enabled, Q pins are driven Low for one cycle in response to NOP and Write Only commands, 3 cycles after the command
is sampled. When D ODT in disabled, Q pins are tri-stated for one cycle in response to NOP and Write Only commands, 3 cycles after the
command is sampled.


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