DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 479

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

Chapter 1: Transceiver Architecture in Stratix IV Devices
Transceiver Block Architecture
Figure 1–32. V
February 2011 Altera Corporation
f
OD
V
= V
OD
(Differential) Signal Level
A
(Differential)
– V
B
The Stratix IV GX and GT transmitter buffers includes programmable on-chip
differential termination of 85, 100, 120, or 150 Ω. The resistance is adjusted by the
on-chip calibration circuit in the calibration block (for more information, refer to
“Calibration Blocks” on page
and process changes. The Stratix IV GX and GT transmitter buffers in the transceiver
are current mode drivers. Therefore, the resultant V
termination value. For more information about resultant V
“Programmable Output Differential Voltage” on page
You can disable OCT and use external termination. If you select external termination,
the transmitter common mode is tri-stated. You can set the transmitter termination in
the ALTGX MegaWizard Plug-In Manager.
You can also set the OCT through the Assignment Editor. Set the assignment shown in
Table 1–15
Table 1–15. Stratix IV GX and GT OCT Assignment Settings
The Stratix IV GX and GT devices allow you to customize the differential output
voltage to handle different trace lengths, various backplanes, and receiver
requirements, as shown in
dynamic reconfiguration controller. Set the V
port of the dynamic reconfiguration controller. For example, to set V
set the tx_vodctrl[2:0] to 011.
For more information about Stratix IV GX and GT V
Switching Characteristics for Stratix IV Devices
Assignment Name
Available Values
Programmable Transmitter Termination
Programmable Output Differential Voltage
Single-Ended Waveform
Differential Waveform
to the transmitter serial output pin.
Assign To
Figure
+V
1–201), which compensates for temperature, voltage,
OD
Output termination
OCT 85 Ω, OCT 100 Ω, OCT 120 Ω, OCT 150 Ω
1–32. You can change the V
+V
V
-
OD
OD
(Differential)
Transmitter Serial Output Data Pin
chapter.
OD
value through the tx_vodctrl[2:0]
Stratix IV Device Handbook Volume 2: Transceivers
OD
OD
is a function of the transmitter
values, refer to the
1–35.
OD
-V
OD
values, refer to
OD
+700
0-V Differential
-700
V
V
A
B
values using the
OD
to a value of 3,
DC and
1–35