Altera UG-01080 Betriebsanweisung Seite 185

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Chapter 9: Custom PHY IP Core 9–11
Byte Order Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Byte ordering pattern
Depends on
configuration
Specifies the pattern that identifies the SOP.
For 16-bit byte ordering pattern you must include a 2-bit pad so that
the pattern entered is in the following format: 00 <pattern> 00
<pattern>. For example, if the required pattern is 10111100, enter the
following pattern: 00101111000010111100
Enter the byte ordering pattern as follows based on the 5
configurations that support byte ordering as described in the Enable
byte ordering block:
Configuration 1: 8-bits
Configuration 2: 10-bits
For example: If you select a /Kx.y/ control code group as the byte
ordering pattern, the most significant 2 bits of the 10-bit byte
ordering pattern must be 2'b01. If you select a /Dx.y/ data code
group as the byte ordering pattern, the most significant 2-bits of
the 10-bit byte ordering pattern must be 2'b00. The least
significant 8-bits must be the 8B/10B decoded version of the code
group used for byte ordering.
Configuration 3:16-bits, 8-bits
Configuration 4: 20-bits only
For example: If you select a /Kx.y/Dx.y/ code group as the byte
ordering pattern, the most significant 2-bits of the 20-bit byte
ordering pattern must be 2'b01. Similarly bit[9:0] must be 2'b00.
Bit[18:10] must be the 8B/10B decoded version of /Kx.y/. Bit[7:0]
must be 8B/10B decoded version of /Dx.y/.
Configuration 5: 20-bits, 10-bits
Byte ordering pad pattern
00000000
Specifies the pad pattern that is inserted to align the SOP. Enter the
following size pad patterns:
Data Width 8B/10B Encoded? Pad Pattern
8, 16, 32 No 8 bits
10,20,40 No 10 bits
8, 16, 32 Yes 9 bits
Table 9–8. Byte Order Options (Part 2 of 2)
Name Value Description
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