Enable byte ordering block |
On/Off |
Turn this option on if your application uses serialization to create a datapath that is larger than 1 symbol. This option is only available if you use the byte deserializer for the following configurations:
- Configuration 1:
- 16-bit FPGA fabric-transceiver interface
- No 8B/10B decoder (8-bit PMA-PCS interface)
- Word aligner in manual alignment mode
- Configuration 2:
- 16-bit FPGA fabric-transceiver interface
- 8B/10B decoder (10-bit PMA-PCS interface)
- Word aligner in automatic synchronization state machine mode
- Configuration 3:
- 32-bit FPGA fabric-transceiver interface
- No 8B/10B decoder (16-bit PMA-PCS interface)
- Word aligner in manual alignment mode
- Configuration 4:
- 32-bit FPGA fabric-transceiver interface
- 8B/10B decoder (20-bit PMA-PCS interface)
- Word aligner in manual alignment mode
- Configuration 5:
- 40-bit FPGA fabric-transceiver interface
- No 8B/10B decoder (20-bit PMA-PCS interface)
- Word aligner in manual alignment mode
This option creates the rx_byteordflag signal which is asserted when the received data is aligned to the byte order pattern that you specified. |
Enable byte ordering block manual control |
On/Off |
Turn this option on to choose manual control of byte ordering. This option creates the rx_enabyteord signal. A byte ordering operation occurs whenever rx_enabyteord is asserted. To perform multiple byte ordering operations, deassert and reassert rx_enabyteord. |
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: 18-bits
- Configuration 5: 20-bits, 10-bits
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/.
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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, 3 |
No |
9 bits |
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