IXP2400 Intel, IXP2400 Datasheet - Page 109

• Manufacturer Part Number: IXP2400
• Manufacturer: Intel

Specifications of IXP2400

• Operating Supply Voltage (typ): 1.3/1.5/2.5/3.3V
• Mounting: Surface Mount
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Not Compliant

4.2.4.1
Datasheet
Table 51. DDR SDRAM AC Parameters for 100/150 MHz (Continued)
Figure 18. Data and Error Correction Setup/Hold Relationship to/from
AC Timing Diagrams
This section provides the AC timing diagrams for the DDR SDRAM interface.
Data Strobe (Read Operation)
T
T
T
T
T
T
T
D_DQ, D_ECC
WPST
DQSS
POE
RCVENOUT
Surcv
HDrcv
preHDrev
Symbol
D_DQS
D_DQS Write Postamble Duration
D_CK Rising Edge Output Access
Time, Where a Write Command is
Referenced, to the First D_DQS
Rising Edge
D_CK Rising Edge Output Access
Time, Where a Write Command is
Referenced, to the D_DQS Preamble
Falling Edge
D_CK Rising Edge Output Access
Time: A Read Command is
Referenced, to the D_RCVENOUT_L
Falling Edge
D_RCVENIN_L Falling Edge Setup
Time to the First D_DQS Rising Edge
D_RCVENIN_L Falling Edge Hold
Time to the First D_DQS Rising Edge
D_RCVENIN_L Falling Edge Hold
Time to the First D_DQS Preamble
Falling Edge
Parameter
Valid Data
t
SU
t
HD
Valid Data
t
SU
t
HD
(tCKlow=
(tCKlow=
12.78
-0.87
-0.87
3.19
5.99
9.45
3.13
Min
2.0)
2.5)
—
150 MHz
Valid Data
Intel
(tCKlow=
(tCKlow=
10.31
13.64
Max
7.08
1.96
2.0)
2.5)
—
—
—
—
®
IXP2400 Network Processor
(tCKlow=
(tCKlow=
0.5xVCC2.5
Valid Data
14.17
19.17
-1.30
-1.30
4.78
8.99
Min
2.0)
2.5)
4.7
—
100 MHz
(tCKlow=
(tCKlow=
10.61
15.47
20.47
A9819-01
Max
2.94
2.0)
2.5)
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
109