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BT8376EPF Datasheet(PDF) 207 Page - Synaptics Incorporated. |
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BT8376EPF Datasheet(HTML) 207 Page - Synaptics Incorporated. |
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207 / 323 page  Bt8370/8375/8376 Fully Integrated T1/E1 Framer and Line Interface 3.15 Bit-Oriented Protocol Registers N8370DSE Conexant 3-89 TBOP_MODE[1:0] Transmit BOP mode—Enables the BOP transmitter and establishes priority of TBOP [addr 0A1] output in relation to TDL1 [addr 0AD] output. When TBOP messages are given output priority, any write to TBOP aborts TDL1 output within the next 8 FDL bit times and suspends TDL1 data output until TBOP has completed transmission. The processor can check TMSG1 status [addr 0AE] before writing TBOP to determine if TDL1 output is idle. The TDL1 buffer can be written while TBOP is granted priority. When TDL1 messages are given output priority, TBOP output is suspended when the TDL1 buffer becomes non-empty. In case of multiple pending messages, PRM messages have highest priority, then BOP, and then TDL1. Furthermore, TBOP is forced to wait until the TDL1 buffer is empty and the TDL1 output is in the idle state before TBOP output is granted priority. If TBOP_LEN is continuous, and TDL1/PRM message output is pending, then TBOP is suspended at the next 16-bit pattern boundary. TDL1 priority is used to transmit PRM, DS1 Idle (ISID), or optional path maintenance (PID, TSID) messages, which are separated by ESF Yellow Alarm codewords, as defined in Annex D of ANSI T1.403. 0A1—Transmit BOP Codeword (TBOP) Writing a codeword into TBOP transmits a BOP message. The LSB is transmitted first. TBOP[5] Sixth bit transmitted TBOP[4] Fifth bit transmitted TBOP[3] Fourth bit transmitted TBOP[2] Third bit transmitted TBOP[1] Second bit transmitted TBOP[0] Transmit BOP codeword; first bit transmitted TBOP_MODE Mode Description 0X Disabled: TBOP writes are ignored 10 TBOP output priority 11 TDL1 output priority 7 6 5 4 3 2 1 0 —— TBOP[5] TBOP[4] TBOP[3] TBOP[2] TBOP[1] TBOP[0] |
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