HC4GX15 Datasheet, PDF (451/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
Built-In Self Test MODES
1–187
Table 1–52. Available PRBS, High Frequency, and Low Frequency Patterns in Single-Width Mode (Part 2 of 2)
Patterns
Polynomial
Channel
Width 8 Bit
(1)
Word
Alignment
Pattern with
Channel
Width 8 Bit
Maximum
Data Rate
With
Channel
Width 8 Bit
(Gbps)
Channel
Width 10 Bit
(1)
Word
Alignment
Pattern
Maximum
Data Rate
with
Channel
Width 10 Bit
(Gbps)
Low
0000011111
N
—
—
Y
—
3.125
Frequency
(2)
Notes to Table 1–52:
(1) Channel width refers to the What is the channel width? option in the General screen of the ALTGX MegaWizard Plug-In Manager. Based on the
selection, an 8 or 10 bits wide pattern is generated as indicated by a Yes (Y) or No (N).
(2) A verifier is not available for the specified patterns.
The status signals rx_bistdone and rx_bisterr indicate the status of the verifier.
The rx_bistdone port gets asserted and stays high when the verifier either receives
one full cycle of incremental pattern or it detects an error in the receiver data. The
rx_bisterr signal gets asserted and stays high when the verifier detects an error.
You can reset the PRBS pattern generator and verifier by asserting the
tx_digitalreset and rx_digitalreset signals, respectively.
PRBS in Double-Width Mode
Table 1–53 shows various PRBS patterns and corresponding word alignment patterns
for PRBS in double-width mode configuration.
Table 1–53. Available PRBS, High Frequency, and Low Frequency Patterns in Double-Width Mode
Patterns
PRBS 7
PRBS 23
Polynomial
X⁷ + X⁶ + 1
X²³ + X¹⁸ + 1
High
1010101010
frequency (2)
Channel
Width 16 Bit
(1)
Y
Y
Y
Word
Alignment
Pattern with
Channel
Width 16 Bit
16’h3040
32’h007FFFF
F
—
Maximum
Data Rate
with
Channel
Width 16 Bit
(Gbps)
5
5
5
Channel
Width 20 Bit
(1)
Y
Y
Y
Word
Alignment
Pattern
20’h43040
40’h00007FF
FFF
—
Maximum
Data Rate
with
Channel
Width 20 Bit
(Gbps)
6.375
6.375
6.375
Low
0000011111
N
—
—
Y
—
Frequency
(2)
Notes to Table 1–53:
(1) Channel width refers to the what is the channel width? option in the General screen of the ALTGX MegaWizard Plug-In
Manager. Based on the selection, a 16 or 20 bits wide pattern is generated as indicated by a Yes (Y) or No (N).
(2) Verifier is not available for the specified patterns.
6.375
The status signals rx_bisterr and rx_bistdone are available to indicate the
status of the verifier. For more information about the behavior of these status signals,
refer to “Single-Width Mode” on page 1–39.
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3