HC4GX15 Datasheet, PDF (273/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 1: HardCopy IV GX Transceiver Architecture
Transceiver Port List
Table 1–2. HardCopy IV GX ALTGX Megafunction Ports (Part 2 of 14)
Port Name
Input/Output
Description
Receiver Physical Coding Sublayer (PCS) Ports
Word Aligner
rx_enapatternalign
rx_patterndetect
Input
Output
Manual word alignment enable control.
Enables the word aligner configured in manual
alignment mode to align to the word alignment
pattern.
■ In single-width modes with 10-bit PMA-PCS
interface, this signal is level-sensitive. When
high, the word aligner re-aligns if the word
alignment pattern appears in a new word
boundary.
■ In single-width modes with 8-bit PMA-PCS
interface and all double-width modes, a
low-to-high transition causes the word
aligner to re-align once, if the word
alignment pattern appears in a new word
boundary.
Asynchronous signal. The minimum
pulse-width is two recovered clock cycles.
Word alignment pattern detect indicator. A high
level indicates that the word alignment pattern
is found on the current word boundary. The
width of this signal depends on the following
channel width:
Channel Width rx_patterndetect
8/10
1
16/20
2
32/40
4
1–9
Scope
Channel
Channel
© June 2009 Altera Corporation
HardCopy IV Device Handbook Volume 3