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DP83266 Datasheet(PDF) 134 Page - National Semiconductor (TI) |
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DP83266 Datasheet(HTML) 134 Page - National Semiconductor (TI) |
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134 / 152 page  80 Signal Descriptions (Continued) The Idle and PH Invalid encodings overlap Idle symbols received while the PLAYERa device is in Active Line State (ALS) or Idle Line State (ILS0 are not considered PH INVALID) Idle symbols received while the PLAYERa device is in states other than ALS or ILS are treated as PH Invalid PH DATARequest The Ring Engine generates the 10-bit byte stream as defined in Table 8-2 Note that all symbol pairs are either control or data symbol pairs Mixed datacontrol symbol pairs are never generated or repeated by the Ring Engine TABLE 8-2 Internal PHY Request Coding Value PRP PRC PRD(7 – 4) PRD(3 – 0) Type 0 1 0 0000 0000 Data Symbol Pair 1 0 0 0000 0001 Data Symbol Pair 254 0 0 1111 1110 Data Symbol Pair 255 1 0 1111 1111 Data Symbol Pair JK 0 1 1101 1101 Start Delimiter I I 0 1 1010 1010 Idle Symbols RR 0 1 0110 0110 Frame Status RS 1 1 0110 0111 Frame Status RT 0 1 0110 0101 Frame Status SS 0 1 0111 0111 Frame Status SR 1 1 0111 0110 Frame Status ST 1 1 0111 0101 Frame Status TR 0 1 0101 0110 Ending Delimiter TS 1 1 0101 0111 Ending Delimiter TT 0 1 0101 0101 Ending Delimiter Where PRP PHY Request Parity bit parity for all symbol pairs is ODD PRC PHY Request control bit 0 t data byte 1 t control byte PRD(7 – 0) PHY Request Data (7 – 0) The Ring Engine can repeat the RT and ST symbol pairs but will not generate them 134 |
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