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SPEAR300 Fiches technique(PDF) 57 Page - STMicroelectronics

No de pièce SPEAR300
Description  Embedded MPU with ARM926 core, flexible memory support, powerful connectivity features and human machine interface
PDF  83 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPEAR300 Fiches technique(HTML) 57 Page - STMicroelectronics

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SPEAr300
Timing requirements
Doc ID 16324 Rev 2
57/83
6
Timing requirements
6.1
DDR2 timing characteristics
The characterization timing is done considering an output load of 10 pF on all the DDR
pads. The operating conditions are in worst case V = 0.90 V TA = 125° C and in best case
V=1.10 V TA = 40° C.
6.1.1
DDR2 read cycle timings
Figure 7.
DDR2 Read cycle waveforms
Figure 8.
DDR2 Read cycle path
Table 26.
DDR2 Read cycle timings
Frequency
t4 max
t5 max
333 MHz
1.24 ns
-495 ps
266 MHz
1.43 ns
-306 ps
200 MHz
1.74 ns
4 ps
t4
t5
t5
t4
t4
DQS
DQ
t3
t1
t2
DLL
D
Q
Q
CLR
SET
DQ
DQS



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