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BT8376EPF Datasheet(PDF) 184 Page - Synaptics Incorporated. |
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BT8376EPF Datasheet(HTML) 184 Page - Synaptics Incorporated. |
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184 / 323 page  Bt8370/8375/8376 3.11 Transmit LIU Registers Fully Integrated T1/E1 Framer and Line Interface 3-66 Conexant N8370DSE PULSE[2:0] Select Transmit Pulse Template—Each positive or negative pulse output on XTIP/XRING is shaped to meet the transmit pulse template according to the selected cable length and type. (Refer to Figure 2-34, TLIU Waveform and Figure 2-41, 0 dB LBO Isolated Pulse Template for T1/E1 isolated pulse templates.) Each time the processor writes to TLIU_CR [addr 068], the default shape values are transferred from internal ROM into SHAPE registers [addr 060–067]. Custom shape programming for alternative cable types or pulse templates will be discussed in a separate Bt8370/8375/8376 application note. AISCLK Enable Automatic ACKI Switching—When AISCLK is active and the clock monitor reports a loss of transmit clock [TLOC; addr 048], the transmitter clock is automatically switched to reference ACKI instead of TCKI, and the transmitter is forced to send AIS (all ones) data. If both AISCLK and TAIS [addr 075] are active, AIS is transmitted using ACKI clock regardless of the clock monitor status. Set AISCLK only if the system supplies an alternate line rate clock on the ACKI pin. PULSE Cable Length Cable Type Application 000 0–133 Ft 100 Ω Twisted Pair T1 DSX 001 133–266 Ft 100 Ω Twisted Pair T1 DSX 010 266–399 Ft 100 Ω Twisted Pair T1 DSX 011 399–533 Ft 100 Ω Twisted Pair T1 DSX 100 533–655 Ft 100 Ω Twisted Pair T1 DSX 101 ITU–T G.703 75 Ω Coaxial Cable E1 110 ITU–T G.703 120 Ω Twisted Pair E1 111 Long Haul FCC Part 68 100 Ω Twisted Pair T1 CSU/NCTE Inputs Status Transmit TAIS AUTO_AIS AISCLK RLOS/RLOC TLOC CLOCK DATA 00 X X 0 TCKI Normal 00 1 X 0 TCKI Normal 00 1 X 1 ACKI AIS 01 X 0 0 TCKI Normal 01 0 0 1 TCKI Normal 01 1 X 1 ACKI AIS 01 0 1 X TCKI AIS 1X 1 X X ACKI AIS 1X 0 X X TCKI AIS |
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