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MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
18
Freescale Semiconductor
DDR SDRAM
Figure 4
shows the DDR SDRAM output timing for address skew with respect to any MCK.
Figure 4. Timing Diagram for t
AOSKEW
Measurement
Figure 5
provides the AC test load for the DDR bus.
Figure 5. DDR AC Test Load
Table 15
shows the DDR SDRAM measurement conditions.
Table 15. DDR SDRAM Measurement Conditions
Symbol
DDR
Unit
Notes
V
TH
MV
REF
± 0.31 V
V
1
V
OUT
0.5
×
GV
DD
V
2
Notes:
1. Data input threshold measurement point.
2. Data output measurement point.
ADDR/CMD
MCK[n]
MCK[n]
t
MCK
CMD
NOOP
ADDR/CMD
CMD
NOOP
t
AOSKEWmax)
t
AOSKEW(min)
Output
Z
0
= 50
Ω
OV
DD
/2
R
L
= 50
Ω