HC4GX15 Datasheet, PDF (338/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–74
Chapter 1: HardCopy IV GX Transceiver Architecture
Receiver Channel Datapath
In addition to restoring the word boundary, the word aligner also implements the
following features:
■ Synchronization state machine in functional modes such as PCI Express (PIPE),
XAUI, GIGE, Serial RapidIO, and Basic single-width
■ Programmable run length violation detection in all functional modes
■ Receiver polarity inversion in all functional modes except PIPE
■ Receiver bit reversal in Basic single-width and Basic double-width modes
■ Receiver byte reversal in Basic double-width modes
Depending on the configured functional mode, the word aligner operates in one of
the following three modes:
■ Manual alignment mode
■ Automatic synchronization state machine mode
■ Bit-slip mode
Figure 1–59 shows the word aligner operation in all supported configurations.
Figure 1–59. Word Aligner in All Supported Configurations
PMA-PCS Interface Width
Single-Width
Double-Width
8-Bit Wide
10-Bit Wide
16-Bit Wide
20-Bit Wide
Manual
Bit-Slip
Alignment
(Basic
(OC-12, OC-48, _{Single-Width)}
Basic Single-Width)
Manual
Bit-Slip
Alignment
(Basic Single-Width,
(Basic
SDI)
Single-Width) _Automatic
Synchronization
State Machine
(PCI Express [PIPE]
XAUI, GIGE,
Basic Single-Width,
Serial RapidIO)
Manual
Alignment
(Basic
Double-Width,
OC-96)
Bit-Slip
(Basic
Double-Width)
Manual
Alignment
(Basic
Double-Width)
Bit-Slip
(Basic
Double-Width)
Word Aligner in Single-Width Mode
In single-width mode, the PMA-PCS interface is either 8 bit or 10 bit wide. In 8 bit
wide PMA-PCS interface modes, the word aligner receives 8 bit wide data from the
deserializer. In 10 bit wide PMA-PCS interface modes, the word aligner receives 10 bit
wide data from the deserializer. Depending on the configured functional mode, you
can configure the word aligner in manual alignment mode, automatic
synchronization state machine mode, or bit-slip mode.
Word Aligner in Single-Width Mode with 8-Bit PMA-PCS Interface Modes
The following functional modes support the 8-bit PMA-PCS interface:
■ SONET/SDH OC-12
■ SONET/SDH OC-48
■ Basic single-width
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation