ppc440gp-3rc500cz Applied Micro Circuits Corporation (AMCC), ppc440gp-3rc500cz Datasheet - Page 76

• Manufacturer Part Number: ppc440gp-3rc500cz
• Description: Power Pc 440gp Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

440GP – Power PC 440GP Embedded Processor
76
In the following examples, the data strobes (DQS) and the data are shown to be coincident. There is actually a
slight skew as specified by the SDRAM specifications, and there can be additional skew due to loading and signal
routing. It is recommended that the signal length for all of the eight DQS signals be matched.
I/O Timing—DDR SDRAM T
Notes:
1. T
2. T
3. The time values for T
Clock Speed (MHz)
SIN
DIN
= Delay from DQS at package pin to C on Stage 1 FF.
= Delay from data at package pin to D on Stage 1 FF.
133
133
133
133
133
133
133
133
133
SIN
DQS0
DQS1
DQS2
DQS3
DQS4
DQS5
DQS6
DQS7
DQS8
Signal Name
include 1/4 of a cycle at the indicated clock speed.
SIN
and T
minimum
T
SIN
2.775
2.775
2.775
2.775
2.775
2.775
2.775
2.775
2.775
(ns)
DIN
maximum
T
SIN
3.775
3.775
3.775
3.775
3.775
3.775
3.775
3.775
3.775
(ns)
MemData00:07
MemData08:15
MemData16:23
MemData24:31
MemData32:39
MemData40:47
MemData48:55
MemData56:63
ECC0:7
Signal Name
Revision 1.08 – April 3, 2008
minimum
T
DIN
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
(ns)
Data Sheet
maximum
T
DIN
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
(ns)
AMCC