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DS2149 Datasheet(PDF) 11 Page - Maxim Integrated Products |
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DS2149 Datasheet(HTML) 11 Page - Maxim Integrated Products |
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11 / 32 page  DS2149 11 of 32 CR2 (B010001): Control Register 2 MSb LSb RESET PAT1 PAT0 TAIS ENLOOP ALB LLB RLB SYMBOL POSITION FUNCTION RESET CR2.7 Resets device states and clears all registers. PAT1 CR2.6 Selects output data pattern (Table 4-F). PAT0 CR2.5 Selects output data pattern (Table 4-F). TAIS CR2.4 0 = Transmit data normally 1 = Transmit unframed all ones ENLOOP CR2.3 0 = Disable in-band loop-code detection 1 = Enable in-band loop-code detection ALB CR2.2 0 = Disable analog loopback 1 = Enable analog loopback LLB CR2.1 0 = Disable local loopback 1 = Enable local loopback RLB CR2.0 0 = Disable remote loopback 1 = Enable remote loopback Table 4-F. Data Pattern Selection PAT0 PAT1 DATA SOURCE 0 0 TPOS/TNEG 0 1 Transmit QRSS 1 0 In-band loop-up 00001 1 1 In-band loop-down 001 CR3 (B010010): Control Register 3 MSb LSb JA6HZ TPD — EQZMON20 EQZMON26 JA128 LIRST TAOZ SYMBOL POSITION FUNCTION JA6HZ CR3.7 0 = Set bandwidth of jitter attenuator to 3Hz 1 = Set bandwidth of jitter attenuator to 6Hz; not available if JA128 = 1 TPD CR3.6 0 = Enable transmitter outputs 1 = Disable transmitter outputs — CR3.5 — EQZMON20 CR3.4 0 = Normal receiver operation 1 = Add 20dB of resistive gain to inbound signal EQZMON26 CR3.3 0 = Normal receiver operation 1 = Add 26dB of resistive gain to inbound signal JA128 CR3.2 0 = Jitter attenuator buffer depth = 32 bits 1 = Jitter attenuator buffer depth = 128 bits LIRST CR3.1 0 = Normal operation 1 = Reset the receive LIU state machine TAOZ CR3.0 0 = Disable transmit alternate 1s and 0s 1 = Enable transmit alternate 1s and 0s |
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