BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 94

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

2.0 Circuit Description
2.8 Transmitter
2-66
B is an AMI pulse and V is a bipolar violation (see
selects the code that forces the BPV output polarity opposite to the prior BPV.
Figure 2-32. Zero Code Substitution Formats
B8ZS octet 000VB0VB, where B represents a normal bipolar pulse and V
represents a BPV. A BPV that is not part of B8ZS octet is a BPV error.
B7ZS encoding is enabled on a per-channel basis in the Transmit Per-Channel
Control register [TPC0 to TPC31; addr 100 to 11F].
to fail to meet the minimum required pulse density, per ANSI T1.403 sliding
window.
NOTE:
HDB3
B8ZS
B7ZS
UMC
The HDB3 line code replaces 4 consecutive 0s by 000V or B00V code, where
The B8ZS line code replaces strings of 8 consecutive 0s or no pulses with the
B7ZS replaces Bit 7 of all assigned time slots with a 1 if the contents are all 0.
PDV enforcer overwrites transmit 0s that would otherwise cause output data
AMI
The enforcer never overwrites a framing bit and is not applicable during
E1 mode.
1
1
Conexant
0
0
Zero Code Substitution Formats
Fully Integrated T1/E1 Framer and Line Interface
0
BPV
BPV
0
Octet
0
0
Figure
BPV
0
2-32). ZCS encoder
BPV
Bt8370/8375/8376
0
1
N8370DSE
1