ep2s130 Altera Corporation, ep2s130 Datasheet - Page 230

• Manufacturer Part Number: ep2s130
• Description: Stratix Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

External Memory Interface Specifications
External
Memory
Interface
Specifications
5–94
Stratix II Device Handbook, Volume 1
Tables 5–94
dedicated circuitry used for interfacing with external memory devices.
Table 5–95
Stratix II DQS delay buffer. Multiply the number of delay buffers that you
are using in the DQS logic block to get the maximum delay achievable in
your system. For example, if you implement a 90° phase shift at 200 MHz,
you use three delay buffers in mode 2. The maximum achievable delay
from the DQS block is then 3 × .416 ps = 1.248 ns.
Notes to
(1)
(2)
Table 5–94. DLL Frequency Range Specifications
Table 5–95. DQS Delay Buffer Maximum Delay in Fast Timing Model
Table 5–96. DQS Period Jitter Specifications for DLL-Delayed Clock
(tDQS_JITTER)
Number of DQS Delay Buffer
Frequency Mode
Frequency Mode
Peak-to-peak period jitter on the phase shifted DQS clock.
Delay stages used for requested DQS phase shift are reported in your project’s
Compilation Report in the Quartus II software.
Table
1, 2, 3
0
1
2
3
lists the maximum delay in the fast timing model for the
Stages
0
through
5–96:
1
2
3
4
(2)
Note (1)
5–101
240 to 350 (–4 and –5 speed grades)
Maximum Delay Per Delay Buffer
contain Stratix II device specifications for the
240 to 400 (–3 speed grade)
(Fast Timing Model)
Frequency Range
Commercial
100 to 175
150 to 230
200 to 310
110
130
160
0.833
0.416
80
Industrial
Altera Corporation
110
130
180
210
Resolution
(Degrees)
May 2007
22.5
Unit
30
30
36
36
ns
ns
Unit
ps
ps
ps
ps