JAJSCV8B May 2016 – December 2021 ADC32RF80 , ADC32RF83
PRODUCTION DATA
The link layer contains the scrambler and the 8b, 10b encoding of any data passed on from the transport layer. Additionally, the link layer also handles the initial lane alignment sequence that can be manually restarted.
The link layer test patterns are intended for testing the quality of the link (jitter testing and so forth). The test patterns do not pass through the 8b, 10b encoder and contain the options listed in Table 8-14.
BIT | NAME | DEFAULT | DESCRIPTION |
---|---|---|---|
7-5 | LINK LAYER TESTMODE | 000 | Generates a pattern according to section 5.3.3.8.2 of the JESD204B document. 000 = Normal ADC data 001 = D21.5 (high-frequency jitter pattern) 010 = K28.5 (mixed-frequency jitter pattern) 011 = Repeat the initial lane alignment (generates a K28.5 character and repeats lane alignment sequences continuously) 100 = 12-octet random pattern (RPAT) jitter pattern |
Furthermore, a 215 pseudo-random binary sequence (PRBS) can be enabled by setting up a custom test pattern (AAAAh) in the ADC section and running AAAAh through the 8b, 10b encoder with scrambling enabled.