EP1S20F484C6N Altera, EP1S20F484C6N Datasheet - Page 420

• Manufacturer Part Number: EP1S20F484C6N
• Description: IC STRATIX FPGA 20K LE 484-FBGA
• Manufacturer: Altera
• Series: Stratix®r

Specifications of EP1S20F484C6N

• Number Of Logic Elements/cells: 18460
• Number Of Labs/clbs: 1846
• Total Ram Bits: 1669248
• Number Of I /o: 361
• Voltage - Supply: 1.425 V ~ 1.575 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

DDR Memory Support Overview
Figure 3–13. DQS Configuration in Stratix & Stratix GX IOE
Notes to
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
3–24
Stratix Device Handbook, Volume 2
You can use the altdqs megafunction to generate the DQS signals.
The OE signal is active low, but the Quartus II software implements this as active high and automatically adds an
inverter before OE register A
The select line can be chosen in the altdqs MegaWizard Plug-In Manager.
The datain_l and datain_h pins are usually connected to V
DQS postamble handling is not shown in this diagram. For more information, see AN 342: Interfacing DDR SDRAM
with Stratix & Stratix GX Devices.
This undelayed DQS signal goes to the LE for the soft postamble circuitry.
You must invert this signal before it reaches the DQ IOE. This signal is automatically inverted if you use the altdq
megafunction to generate the DQ signals. Connect this port to the inclock port in the altdq megafunction.
DQS phase-shift circuitry is only available on DQS pins.
Logic Array
Figure
3–13:
datain_h (3)
(3)
datain_l (4)
system clock
OE
undelayed DQS (6)
combout (7)
OE
during compilation.
(2)
Output Register A
Output Register B
OE Register A
OE Register B
DFF
DFF
DFF
DFF
D
D
D
D
Q
Q
Q
Q
OE
OE
O
O
1
0
CC
Note (1)
and ground, respectively.
0
1
OR2
Shift Circuitry
DQS Phase
(8)
TRI
Altera Corporation
June 2006
DQS Pin (5)