User guide

Table 2-53: Bit Encodings for Basic Double Width Mode
For basic double width mode, the total word length is 66-bit with 128-bit data and 4-bit synchronous header.
Name Bit Functionality Description
tx_control
[1:0] Synchronous header The value 2'b01 indicates a data word. The
value 2'b10 indicates a control word.
[8:2] Unused
[10:9] Synchronous header The value 2'b01 indicates a data word. The
value 2'b10 indicates a control word.
[17:11] Unused
Table 2-54: Bit Encodings for Basic Mode
In this case, the total word length is 67-bit with 64-bit data and 2-bit synchronous header.
Name Bit Functionality Description
tx_control
[1:0] Synchronous header The value 2'b01 indicates a data word. The
value 2'b10 indicates a control word.
[2] Inversion control A logic low indicates that built-in disparity
generator block in the Enhanced PCS
maintains the running disparity.
2-64
Enhanced PCS TX and RX Control Ports
UG-01143
2015.05.11
Altera Corporation
Implementing Protocols in Arria 10 Transceivers
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