DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 518

• 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

1–74
Stratix IV Device Handbook Volume 2: Transceivers
Figure 1–56
datapath configurations.
Figure 1–56. Receiver Bit Reversal in Double-Width Mode
Because receiver bit reversal is done at the output of the word aligner, a dynamic bit
reversal also requires a reversal of the word alignment pattern. As a result, the
Receiver Bit Reversal feature is dynamic only if the receiver is dynamically
reconfigurable (it allows changing the word alignment pattern dynamically) or uses
manual bit slip alignment mode (no word alignment pattern). The Receiver Bit
Reversal feature is static in all other Basic mode configurations. You can enable this
feature using the MegaWizard Plug-In Manager. In configurations where the Receiver
Bit Reversal feature is dynamic, an rx_revbitordwa port is available to control the bit
reversal dynamically. A high on the rx_revbitordwa port reverses the bit order at the
input of the word aligner.
shows the receiver bit reversal feature in Basic double-width 20-bit wide
Output of Word Aligner
before RX bit reversal
D[19]
D[18]
D[17]
D[16]
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
rx_revbitordwa = high
Chapter 1: Transceiver Architecture in Stratix IV Devices
Output of Word Aligner
after RX bit reversal
D[10]
D[11]
D[12]
D[13]
D[14]
D[15]
D[16]
D[17]
D[18]
D[19]
D[0]
D[1]
D[2]
D[3]
D[4]
D[5]
D[6]
D[7]
D[8]
D[9]
February 2011 Altera Corporation
Transceiver Block Architecture