HC4GX15 Datasheet, PDF (376/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–112
Chapter 1: HardCopy IV GX Transceiver Architecture
Receiver Channel Datapath
Table 1–26. Byte Ordering Pattern Length in Basic Single-Width Mode
Functional Mode
Byte Ordering Pattern
Length
Byte Ordering PAD
Pattern Length
Basic single-width mode with:
■ 16-bit core fabric-transceiver interface
8 bit
8 bit
■ No 8B/10B decoder
■ Word aligner in manual alignment mode
Basic single-width mode with:
■ 16-bit core fabric-transceiver interface
■ 8B/10B decoder
9 bit (1)
9 bit
■ Word aligner in automatic synchronization
state machine mode
Note to Table 1–26:
(1) If a /Kx.y/ control code group is selected as the byte ordering pattern, the MSB of the 9-bit byte ordering pattern
must be 1'b1. If a /Dx.y/ data code group is selected as the byte ordering pattern, the MSB of the 9-bit byte ordering
pattern must be 1'b0. The least significant 8 bits must be the 8B/10B decoded version of the code group used for
byte ordering.
Byte Ordering Block in Double-Width Modes
The byte ordering block is available in the following double-width functional modes:
■ Basic double-width mode with:
■ 32-bit core fabric-transceiver interface
■ No 8B/10B decoder (16-bit PMA-PCS interface)
■ Word aligner in manual alignment mode
■ Basic double-width mode with:
■ 32-bit core fabric-transceiver interface
■ 8B/10B decoder (20-bit PMA-PCS interface)
■ Word aligner in manual alignment mode
■ Basic double-width mode with:
■ 40-bit core fabric-transceiver interface
■ No 8B/10B decoder (20-bit PMA-PCS interface)
■ Word aligner in manual alignment mode
1 For more information about configurations that allow the byte ordering block in the
receiver datapath, refer to “Basic Double-Width Mode Configurations” on page 1–122.
In Basic double-width modes, you can program a custom byte ordering pattern and
byte ordering PAD pattern in the ALTGX MegaWizard Plug-In Manager. Table 1–27
shows the byte ordering pattern length allowed in Basic double-width mode.
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation