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DAC39J84IAAVR Datasheet(PDF) 53 Page - Texas Instruments |
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DAC39J84IAAVR Datasheet(HTML) 53 Page - Texas Instruments |
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53 / 146 page  DAC39J84 www.ti.com SLASE48A – NOVEMBER 2014 – REVISED JANUARY 2015 Table 22. ws_tuning Chain FIELD DESCRIPTION HEAD (STARTING FROM THE MSB OF CHAIN) RETIME No function. RECEIVER (FOR EACH LANE 0,1,2,3) PATTERRTHR[2:0] Resync error threshold. PATT TIMER PRBS Timer. RXDSEL[3:0] Status select. ENCOR Enable clear-on-read for error counter. EQZERO[4:0] EQZ OVRi Equalizer zero. EQZ OVR Equalizer zero over-ride. EQLEVEL[15:0] EQ OVRi Equalizer gain observe or set. EQ OVR Equalizer over-ride. EQBOOST[1:0] Equalizer gain boost. RXASEL[2:0] Selects amux output. TAIL (ENDING WITH THE LSB OF CHAIN) ASEL[3:0] Selects amux output. USR PATT[19:0] User-defined test pattern. RETIME No function. CHAIN LENGTH = 174 BITS Table 23. ws_char Chain FIELD DESCRIPTION HEAD (STARTING FROM THE MSB OF CHAIN) RETIME No function. RECEIVER (FOR EACH LANE 0,1,2,3) TESTFAIL Test failure (sticky). ECOUNT[11:0] Error counter. ESWORD[7:0] Eye scan word masking. ES[3:0] Eye scan. ESPO[6:0] Eye scan phase offset. ES BIT SELECT[4:0] Eye scan compare bit select. ESVO[5:0] Eye scan voltage offset. ESVO OVR Eye scan voltage offset override. ESLEN[1:0] Eye scan run length. ESRUN Eye scan run. ESDONE Eye scan done. TAIL (ENDING WITH THE LSB OF CHAIN) RETIME No function. CHAIN LENGTH = 194 BITS 7.3.20 Error Counter All receive channels include a 12-bit counter for accumulating pattern verification errors. This counter is accessible via the ECOUNT IEEE1500 Char field. It is an essential part of the eye scan capability (see next section), though can be used independently of this.. The counter increments once for every cycle that the TESTFAIL bit is detected. The counter will not increment when at its maximum value (i.e., all 1s). When an IEEE1500 capture is performed, the count value is loaded into the ECOUNT scan elements (so that it can be scanned out), and the counter is then reset, provided ENCOR is set high. Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 53 Product Folder Links: DAC39J84 |
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