HC4GX15 Datasheet, PDF (348/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–84
Chapter 1: HardCopy IV GX Transceiver Architecture
Receiver Channel Datapath
Table 1–24 summarizes the word aligner options available in Basic single-width and
double-width modes.
Table 1–24. Word Aligner Options Available in Basic Single-Width and Double-Width Modes (Note 1) (Part 1 of 2)
Functional
Mode
Basic
Single-Width
PMA-PCS
Interface
Width
Word
Alignment
Mode
Manual
Alignment
8 bit
Bit-Slip
Manual
Alignment
10 bit
Bit Slip
Automatic
Synchronization
State Machine
Word
Alignment
Pattern
Length
16 bit
16 bit
7 and 10-bit
7 and 10-bit
7 and 10-bit
rx_enapatternalign rx_syncstatus rx_patterndetect
Sensitivity
Behavior
Behavior
Rising Edge
Sensitive
Asserted high for
one parallel clock
cycle when the
word aligner
aligns to a new
word boundary.
Asserted high for
one parallel clock
cycle when the
word alignment
pattern appears in
the current word
boundary.
Asserted high for
one parallel clock
cycle when the
—
—
word alignment
pattern appears in
the current word
boundary.
Level Sensitive
Asserted high for
one parallel clock
cycle when the
word aligner
aligns to a new
word boundary.
Asserted high for
one parallel clock
cycle when the
word alignment
pattern appears in
the current word
boundary.
Asserted high for
one parallel clock
cycle when the
—
—
word alignment
pattern appears in
the current word
boundary.
Stays high as Asserted high for
long as the
one parallel clock
synchronization cycle when the
—
conditions are word alignment
satisfied.
pattern appears in
the current word
boundary.
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation