mpc8560vt667jb Freescale Semiconductor, Inc, mpc8560vt667jb Datasheet - Page 19

• Manufacturer Part Number: mpc8560vt667jb
• Description: Mpc8560 Powerquicc Iii Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

6.2 DDR SDRAM AC Electrical Characteristics
This section provides the AC electrical characteristics for the DDR SDRAM interface.
6.2.1 DDR SDRAM Input AC Timing Specifications
Table 15
Freescale Semiconductor
At recommended operating conditions with GV
AC input low voltage
AC input high voltage
MDQS—MDQ/MECC input skew per byte
Note:
1.Maximum possible skew between a data strobe (MDQS[n]) and any corresponding bit of data (MDQ[8n + {0...7}] if
2.For timing budget analysis, the MPC8560 consumes ±550 ps of the total budget.
0 ≤ n ≤ 7) or ECC (MECC[{0...7}] if n=8).
provides the input AC timing specifications for the DDR SDRAM interface.
MDQS[n]
MDQ[n]
Parameter
For DDR = 333 MHz
For DDR ≤ 266 MHz
MPC8560 Integrated Processor Hardware Specifications, Rev. 4.2
Table 15. DDR SDRAM Input AC Timing Specifications
Figure 4. DDR SDRAM Interface Input Timing
DD
of 2.5 V ± 5%.
t
DISKEW
Symbol
t
DISKEW
V
V
IL
IH
MV
REF
-1125
-750
Min
—
+ 0.31
t
DISKEW
MV
GV
REF
DD
1125
Max
750
– 0.31
+ 0.3
Unit
ps
V
V
Notes
DDR SDRAM
1, 2
—
—
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