PPC440GX-3FF533C AMCC [Applied Micro Circuits Corporation], PPC440GX-3FF533C Datasheet - Page 85

• Manufacturer Part Number: PPC440GX-3FF533C
• Description: Power PC 440GX Embedded Processor
• Manufacturer: AMCC [Applied Micro Circuits Corporation]

Revision 1.15 – August 30, 2007
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.
AMCC
I/O Timing—DDR SDRAM T
Notes:
1. T
2. T
3. The time values for T
Data Sheet
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.
166
166
166
166
166
166
166
166
166
200
200
200
200
200
200
200
200
200
SIN
DQS0
DQS1
DQS2
DQS3
DQS4
DQS5
DQS6
DQS7
DQS8
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
2.132
2.132
2.127
2.116
2.100
2.103
2.144
2.110
2.122
1.942
1.920
1.938
1.945
1.932
1.936
1.938
1.943
1.952
(ns)
DIN
440GX – Power PC 440GX Embedded Processor
maximum
T
SIN
2.884
2.867
2.873
2.851
2.845
2.844
2.902
2.864
2.860
2.365
2.314
2.361
2.370
2.332
2.348
2.356
2.360
2.381
(ns)
MemData00:07
MemData08:15
MemData16:23
MemData24:31
MemData32:39
MemData40:47
MemData48:55
MemData56:63
ECC0:7
MemData00:07
MemData08:15
MemData16:23
MemData24:31
MemData32:39
MemData40:47
MemData48:55
MemData56:63
ECC0:7
Signal Name
minimum
T
DIN
0.779
0.789
0.779
0.791
0.766
0.754
0.747
0.770
0.759
0.638
0.631
0.634
0.624
0.630
0.619
0.635
0.642
0.641
(ns)
maximum
T
DIN
1.502
1.521
1.530
1.553
1.501
1.525
1.513
1.521
1.464
1.165
1.149
1.151
1.169
1.151
1.133
1.149
1.151
1.141
(ns)
85