DS21352L+ Maxim Integrated Products, DS21352L+ Datasheet - Page 51

• Manufacturer Part Number: DS21352L+
• Description: IC TXRX T1 1-CHIP 3.3V 100-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21352L+

• Function: Single-Chip Transceiver
• Interface: HDLC, T1
• Number Of Circuits: 1
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Includes: DSX-1 and CSU Line Build-Out Generator, HDLC Controller, In-Band Loop Code Generator and Detector
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

8.1 LINE CODE VIOLATION COUNT REGISTER (LCVCR)
Line Code Violation Count Register 1 (LCVCR1) is the most significant word and LCVCR2 is the least
significant word of a 16–bit counter that records code violations (CVs). CVs are defined as Bipolar
Violations (BPVs) or excessive zeros. See Table 8-1 for details of exactly what the LCVCRs count. If the
B8ZS mode is set for the receive side via CCR2.2, then B8ZS code words are not counted. This counter is
always enabled; it is not disabled during receive loss of synchronization (RLOS=1) conditions.
LCVCR1: LINE CODE VIOLATION COUNT REGISTER 1 (Address = 23 Hex)
LCVCR2: LINE CODE VIOLATION COUNT REGISTER 2 (Address = 24 Hex)
Table 8-1 LINE CODE VIOLATION COUNTING ARRANGEMENTS
COUNT EXCESSIVE ZEROS
SYMBOL
LCV15
(MSB)
LCV7
LCV15
LCV0
(RCR1.7)
yes
yes
no
no
LCV14
LCV6
POSITION
LCVCR1.7
LCVCR2.0
LCV13
LCV5
NAME AND DESCRIPTION
MSB of the 16–bit code violation count
LSB of the 16–bit code violation count
B8ZS ENABLED
LCV12
LCV4
(CCR2.2)
yes
yes
no
no
51 of 137
LCV11
LCV3
BPVs
BPVs + 16 consecutive zeros
BPVs (B8ZS code words not counted)
BPV’s + 8 consecutive zeros
LCV10
LCV2
WHAT IS COUNTED
LCV9
LCV1
IN THE LCVCRs
(LSB)
LCV8
LCV0
DS21352/DS21552
LCVCR1
LCVCR2