MPC8379E-MDS-PB Freescale Semiconductor, MPC8379E-MDS-PB Datasheet - Page 19

• Manufacturer Part Number: MPC8379E-MDS-PB
• Description: BOARD PROCESSOR FOR MDS S
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC II™ PROr
• Type: MPUr

Specifications of MPC8379E-MDS-PB

• Contents: Board
• For Use With/related Products: MPC8379
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 20
6.2.2
Table 21
Freescale Semiconductor
Controller skew for MDQS-MDQ/MECC/MDM
Note:
1
2
3
MCKn cycle time, MCKn/MCKn crossing
ADDR/CMD output setup with respect to MCK
ADDR/CMD output hold with respect to MCK
MCSn output setup with respect to MCK
MCSn output hold with respect to MCK
MCK to MDQS skew
t
be captured with MDQSn. This should be subtracted from the total timing budget.
The amount of skew that can be tolerated from MDQS to a corresponding MDQ signal is called t
determined by the following equation: t
absolute value of t
This specification applies only to DDR2 interface.
CISKEW
provides the input AC timing specifications for the DDR1 and DDR2 SDRAM interface.
shows the DDR1 and DDR2 SDRAM output AC timing specifications.
represents the total amount of skew consumed by the controller between MDQSn and any corresponding bit that will
DDR1 and DDR2 SDRAM Output AC Timing Specifications
Parameter
Parameter
CISKEW
Table 21. DDR1 and DDR2 SDRAM Output AC Timing Specifications
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4
Table 20. DDR1 and DDR2 SDRAM Input AC Timing Specifications
.
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
400 MHz data rate
333 MHz data rate
266 MHz data rate
200 MHz data rate
400 MHz data rate
333 MHz data rate
266 MHz data rate
DISKEW
= ±[T/4 – |t
Symbol
t
t
t
t
t
DDKHMH
DDKHCS
DDKHCX
DDKHAS
DDKHAX
Symbol
t
CISKEW
t
MCK
CISKEW
1
|] where T is the MCK clock period and |t
–500
–750
–750
Min
1.95
2.40
3.15
4.20
1.95
2.40
3.15
4.20
1.95
2.40
3.15
4.20
1.95
2.40
3.15
4.20
–0.6
Min
5
Max
500
750
750
Max
0.6
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
DISKEW
DDR1 and DDR2 SDRAM
Unit
. This can be
ps
CISKEW
Unit
ns
ns
ns
ns
ns
ns
| is the
Notes
Notes
1, 2
—
—
3, 7
3, 7
4, 8
3
2
3
3
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