Visible to Intel only — GUID: nik1398984211087
Ixiasoft
Visible to Intel only — GUID: nik1398984211087
Ixiasoft
13.4.4.1. 10G PCS Pattern Generators
The 10G PCS supports the PRBS, pseudo-random pattern, and square wave pattern generators. You enable the pattern generator or verifiers in the 10G PCS, by writing a 1 to the TX Test Enable and RX Test Enable bits. The following table lists the offsets and registers of the pattern generators and verifiers in the 10G PCS.
- The 10G PRBS generator inverts its pattern before transmission. The 10G PRBS verifier inverts the received pattern before verification. You may need to invert the patterns if you connect to third-party PRBS pattern generators and checkers.
- All undefined register bits are reserved.
Offset |
Bits |
R/W |
Name |
Description |
---|---|---|---|---|
0x12D |
[15:0] |
R/W |
Seed A for PRP | Bits [15:0] of seed A for the pseudo-random pattern. |
0x12E |
[15:0] |
Bits [31:16] of seed A for the pseudo-random pattern. |
||
0x12F |
[15:0] |
Bits [47:21] of seed A for the pseudo-random pattern. |
||
0x130 |
[9:0] |
Bits [57:48] of seed A for the pseudo-random pattern. |
||
0x131 |
[15:0] |
R/W |
Seed B for PRP | Bits [15:0] of seed B for the pseudo-random pattern. |
0x132 |
[15:0] |
Bits [31:16] of seed B for the pseudo-random pattern. |
||
0x133 |
[15:0] |
Bits [47:32] of seed B for the pseudo-random pattern. |
||
0x134 |
[9:0] |
Bits [57:48] of seed B for the pseudo-random pattern. |
||
0x135 |
[15:12] |
R/W |
Square Wave Pattern | Specifies the number of consecutive 1s and 0s. The following values are available: 1, 4, 5, 6, 8, and 10. |
[10] |
R/W |
TX PRBS 7 Enable | Enables the PRBS-7 polynomial in the transmitter. |
|
[8] |
R/W |
TX PRBS 23 Enable | Enables the PRBS-23 polynomial in the transmitter. |
|
[6] |
R/W |
TX PRBS 9 Enable | Enables the PRBS-9 polynomial in the transmitter. |
|
[4] |
R/W |
TX PRBS 31 Enable | Enables the PRBS-31 Polynomial in the transmitter. |
|
[3] |
R/W |
TX Test Enable | Enables the pattern generator in the transmitter. |
|
[1] |
R/W |
TX Test Pattern Select | Selects between the square wave or pseudo-random pattern generator. The following encodings are defined:
|
|
[0] |
R/W |
Data Pattern Select |
Selects the data pattern for the pseudo-random pattern. The following encodings are defined:
|
|
0x137 |
[2] |
R/W |
TX PRBS Clock Enable | Enables the transmitter PRBS clock. |
[1] |
R/W |
TX Square Wave Clock Enable | Enables the square wave clock. |
|
0x15E |
[14] |
R/W |
RX PRBS 7 Enable | Enables the PRBS-7 polynomial in the receiver. |
[13] |
R/W |
RX PRBS 23 Enable | Enables the PRBS-23 polynomial in the receiver. |
|
[12] |
R/W |
RX PRBS 9 Enable | Enables the PRBS-9 polynomial in the receiver. |
|
[11] |
R/W |
RX PRBS 31 Enable | Enables the PRBS-31 polynomial in the receiver. |
|
[10] |
R/W |
RX Test Enable | Enables the PRBS pattern verifier in the receiver. |
|
0x164 |
[10] |
R/W |
RX PRBS Clock Enable | Enables the receiver PRBS Clock. |
0x169 |
[0] |
R/W |
RX Test Pattern Select | Selects between a square wave or pseudo-random pattern. The following encodings are defined:
|
PRBS Pattern Generator
To enable the PRBS pattern generator, write 1'b1 to the RX PRBS Clock Enable and TX PRBS Clock Enable bits.
Pattern | Polynomial |
PRBS-31 | X31+x28+1 |
PRBS-9 | X9+x5+1 |
PRBS-23 | X23+x18+1 |
PRBS-7 | X7+x6+1 |
Pseudo-Random Pattern Generator
The pseudo-random pattern generator is specifically designed for the 10GBASE-R and 1588 protocols. To enable this pattern generator, write the following bits:
-
Write 1'b0 to the TX Test Pattern Select bit.
- Write 1'b1 to the TX Test Enable bit.
In addition you have the following options:
-
You can toggle the Data Pattern Select bit switch between two data patterns.
- You can change the value of Seed A and Seed B.
Unlike the PRBS pattern generator, the pseudo-random pattern generator does not require a configurable clock.
Square Wave Generator
To enable the square wave, write the following bits:
-
Write 1'b1 to the TX Test Enable bit.
- Write 1'b1 to the Square Wave Clock Enable bit.
-
Write 1'b1 to the TX Test Select bit.
-
Write the Square Wave Pattern to 1, 4, 5, 6, 8 or 10 consecutive 1s or 0s.
The RX datapath does not include a verifier for the square wave and does drive a clock.