DS3172N Maxim Integrated, DS3172N Datasheet - Page 106

• Manufacturer Part Number: DS3172N
• Description: Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
• Manufacturer: Maxim Integrated

Specifications of DS3172N

• Part # Aliases: 90-31720-N00

LOS condition, the first B3ZS/HDB3 signature to be detected will not depend upon the polarity of any BPV
contained within the signature.
Figure 10-26. B3ZS Signatures
Figure 10-27. HDB3 Signatures
BPV detection checks the bipolar signal for bipolar violation (BPV) errors and E3 code violation (CV) errors. A BPV
error is declared if two 1’s are detected on RXP or RXN without an intervening 1 on RXN or RXP, and the 1’s are
not part of a B3ZS/HDB3 signature, or when both RXP and RXN are a one. An E3 coding violation is declared if
consecutive BPVs of the same polarity are detected (ITU O.161 definition). E3 CVs are accumulated in the BPV
counter (LINE.RBPVCR register) if E3 CV detection has been enabled (applicable only in HDB3 mode), otherwise,
BPVs are accumulated in the BPV counter. If zero code suppression is disabled, the BPV counter will count all
bipolar violations. The BPV counter will count pulses on the RLCVn pin when the device is configured for unipolar
mode.
(RX DATA)
(RX DATA)
(RX DATA)
(RX DATA)
RLCLK
RLCLK
RNEG
RPOS
RLCLK
RPOS
RNEG
RNEG
RPOS
RLCLK
RNEG
RPOS
V
V
V
V
106
V
V
HDB3 SIGNATURE WHEN
LINE.RCR.REZSF = 1
B3ZS SIGNATURE WHEN
LINE.RCR.REZSF = 1
HDB3 SIGNATURE WHEN
LINE.RCR.REZSF = 0
B3ZS SIGNATURE WHEN
LINE.RCR.REZSF = 0