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MPC8544E bảng dữ liệu(PDF) 20 Page - Freescale Semiconductor, Inc

tên linh kiện MPC8544E
Giải thích chi tiết về linh kiện  MPC8544E PowerQUICC III Integrated Processor Hardware Specifications
PDF  117 Pages
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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
20
Freescale Semiconductor
DDR and DDR2 SDRAM
6.2.2
DDR SDRAM Output AC Timing Specifications
Table 18 provides the output AC timing specifications for the DDR SDRAM interface.
Table 18. DDR SDRAM Output AC Timing Specifications
At recommended operating conditions.
Parameter
Symbol1
Min
Max
Unit
Notes
MCK[n] cycle time, MCK[n]/MCK[n] crossing
tMCK
3.75
6
ns
2
ADDR/CMD output setup with respect to MCK
tDDKHAS
ns
3
533 MHz
400 MHz
333 MHz
1.48
1.95
2.40
7
ADDR/CMD output hold with respect to MCK
tDDKHAX
ns
3
533 MHz
400 MHz
333 MHz
1.48
1.95
2.40
7
MCS[n] output setup with respect to MCK
tDDKHCS
ns
3
533 MHz
400 MHz
333 MHz
1.48
1.95
2.40
7
MCS[n] output hold with respect to MCK
tDDKHCX
ns
3
533 MHz
400 MHz
333 MHz
1.48
1.95
2.40
7
MCK to MDQS Skew
tDDKHMH
–0.6
0.6
ns
4
MDQ/MECC/MDM output setup with respect
to MDQS
tDDKHDS,
tDDKLDS
ps
5
533 MHz
400 MHz
333 MHz
538
700
900
7
MDQ/MECC/MDM output hold with respect to
MDQS
tDDKHDX,
tDDKLDX
ps
5
533 MHz
400 MHz
333 MHz
538
700
900
7
MDQS preamble
tDDKHMP
0.75 x tMCK
ns
6



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