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BT8376EPF Datasheet(PDF) 128 Page - Synaptics Incorporated. |
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BT8376EPF Datasheet(HTML) 128 Page - Synaptics Incorporated. |
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128 / 323 page  3.0 Registers Bt8370/8375/8376 3.2 Global Control and Status Registers Fully Integrated T1/E1 Framer and Line Interface 3-10 Conexant N8370DSE RFRAME[3:0] Receiver Framer mode—Establishes the offline framer's search criteria for recovery of frame alignment (reframe). Also works in conjunction with the RLOFA–RLOFD bits [addr 040] to establish the online framer's criteria for loss of frame alignment. Refer to Table A-1, Superframe Format through Table A-1, Superframe Format to find which frame bits are monitored, and refer to Table 2-3, Criteria for Loss/Recovery of Receive Framer Alignment for frame alignment loss/recovery criteria during the selected mode. Mode descriptions are listed in Table 3-2. The online framer’s SF, SLC, CAS, and MFAS criteria for loss/recovery of multiframe alignment is also selected by RFRAME[3:0]. T1/E1N Global T1/E1 Select—Affects all Bt8370/8375/8376 functions by enabling receive and transmit circuits to operate at either the T1 or E1 line rate. The processor must reinitialize all control register settings after changing the T1/E1N control bit. T1/E1N selects the nominal line rate (shown below), while the exact receive and transmit line rate frequencies are independently determined by their respective input clock or data references. The actual receive and transmit line frequency can vary within defined tolerances. 0 = 2.048 MHz line rate (E1) 1 = 1.544 MHz line rate (T1) Table 3-2. Receive Framer Modes RFRAME[3:0] T1/E1N Receive Framer Mode 000X 0 FAS Only 001X 0 FAS Only + BSLIP 010X 0 FAS + CRC 011X 0 FAS + CRC + BSLIP 100X 0 FAS + CAS 101X 0 FAS + CAS + BSLIP 110X 0 FAS + CRC + CAS 111X 0 FAS + CRC + CAS + BSLIP 0000 1 FT Only 0001 1 ESF + No CRC (FPS only) 0100 1 SF 0101 1 SF + JYEL 0110 1 SF + T1DM 1000 1 SLC + FSLOF 1001 1 SLC 1100 1 ESF + Mimic CRC 1101 1 ESF + Force CRC |
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