By Gravett C., Dann G.

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Request (tx_symb_vector). STD Alias for symb_timer_done. Copyright © 1999 IEEE. All rights reserved. 4 State diagrams pcs_reset = ON + link_status = FAIL DISABLE DATA TRANSMISSION tx_enable ⇐FALSE tx_error ⇐FALSE tx_mode = SEND_N* TX_EN = FALSE * TX_ER = FALSE ENABLE DATA TRANSMISSION tx_enable ⇐TX_EN tx_error ⇐TX_ER tx_mode = SEND_N tx_mode ≠ SEND_N Figure 40-8—PCS Data Transmission Enabling state diagram 48 Copyright © 1999 IEEE. All rights reserved. 3ab-1999 C STD * tx_enable = TRUE * tx_error = FALSE A pcs_reset = ON SSD1 VECTOR SEND IDLE 1000BTtransmit ⇐ TRUE COL ⇐ 1000BTreceive tx_symb_vector ⇐ SSD1 PUDR 1000BTtransmit ⇐ FALSE COL ⇐ FALSE tx_symb_vector ⇐ IDLE PUDR STD * tx_error = FALSE D STD * tx_enable = FALSE SSD2 VECTOR STD * tx_enable = TRUE * tx_error = TRUE SSD1 VECTOR, ERROR 1000BTtransmit ⇐ TRUE COL ⇐ 1000BTreceive tx_symb_vector ⇐ SSD1 PUDR COL ⇐ 1000BTreceive tx_symb_vector ⇐ SSD2 PUDR STD STD ERROR CHECK STD tx_enable = TRUE* tx_error = TRUE SSD2 VECTOR, ERROR COL ⇐ 1000BTreceive tx_symb_vector ⇐ SSD2 PUDR TRANSMIT ERROR COL ⇐ 1000BTreceive tx_symb_vector ⇐ xmt_err PUDR STD ELSE tx_enable = FALSE * tx_error = TRUE 1st CSReset VECTOR 1000BTtransmit ⇐ FALSE COL ⇐ FALSE tx_symb_vector ⇐ CSReset PUDR 1st CS Extension VECTOR COL ⇐ 1000BTreceive If (TXD<7:0> = 0x0F) THEN tx_symb_vector ⇐ CSExtend ELSE tx_symb_vector ⇐ CSExtend_Err PUDR STD 2nd CSReset VECTOR 1000BTtransmit ⇐ FALSE COL ⇐ FALSE tx_symb_vector ⇐ CSReset PUDR STD STD * tx_error = FALSE tx_enable = TRUE * tx_error = FALSE TRANSMIT DATA COL ⇐ 1000BTreceive tx_symb_vector⇐ENCODE(TXD<7:0>) PUDR STD CARRIER EXTENSION COL ⇐ 1000BTreceive If (TXD<7:0> = 0x0F) THEN tx_symb_vector ⇐ CEXT ELSE tx_symb_vector ⇐ CEXT_Err PUDR STD * tx_error = TRUE 2nd CS Extension VECTOR COL ⇐ 1000BTreceive If (TXD<7:0> = 0x0F) THEN tx_symb_vector ⇐ CSExtend ELSE tx_symb_vector ⇐ CSExtend_Err PUDR ESD1 VECTOR 1000BTtransmit ⇐ FALSE COL ⇐ FALSE tx_symb_vector ⇐ ESD1 PUDR STD STD * tx_error = FALSE STD * tx_enable = FALSE * tx_error = TRUE B STD * tx_error = TRUE STD* tx_enable = TRUE* tx_error = TRUE STD* C tx_enable = TRUE* tx_error = FALSE STD* tx_enable = FALSE * tx_error = TRUE D A ESD1 VECTOR with Extension ESD2_ext_0 VECTOR COL ⇐ 1000BTreceive COL ⇐ FALSE If (TXD<7:0> = 0x0F) tx_symb_vector ⇐ ESD2_ext_0 THEN tx_symb_vector ⇐ ESD1 PUDR ELSE tx_symb_vector ⇐ ESD_Ext_Err PUDR STD STD * tx_error = FALSE STD * tx_error = TRUE A ESD2 VECTOR with Extension ESD2_ext_1 VECTOR 1000BTtransmit ⇐ FALSE COL ⇐ FALSE tx_symb_vector ⇐ ESD2_ext_1 PUDR STD A COL ⇐ 1000BTreceive If (TXD<7:0> = 0x0F) THEN tx_symb_vector ⇐ ESD2_ext_2 ELSE tx_symb_vector ⇐ ESD_Ext_Err PUDR STD * tx_error = FALSE STD * tx_error = TRUE A B Figure 40-9—PCS Transmit state diagram Copyright © 1999 IEEE.

Request (SYMB_4D) synchronously with every transmit clock cycle. 3 Effect of receipt Upon receipt of this primitive the PMA transmits on the MDI the signals corresponding to the indicated quinary symbols. The parameter tx_symb_vector is also used by the PMA Receive function to process the signals received on pairs BI_DA, BI_DB, BI_DC, and BI_DD. indicate This primitive defines the transfer of code-groups in the form of the rx_symb_vector parameter from the PMA to the PCS. indicate simultaneously conveys to the PCS via the parameter rx_symb_vector the values of the symbols detected on each of the four receive pairs BI_DA, BI_DB, BI_DC, and BI_DD.

Request simultaneously conveys to the PMA via the parameter tx_symb_vector the value of the symbols to be sent over each of the four transmit pairs BI_DA, BI_DB, BI_DC, and BI_DD. The tx_symb_vector parameter takes on the form: SYMB_4D A vector of four quinary symbols, one for each of the four transmit pairs BI_DA, BI_DB, BI_DC, and BI_DD. Each quinary symbol may take on one of the values –2, –1, 0, +1, or +2. The quinary symbols that are elements of tx_symb_vector are called, according to the pair on which each will be transmitted, tx_symb_vector[BI_DA], tx_symb_vector[BI_DB], tx_symb_vector[BI_DC], and tx_symb_vector[BI_DD].

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