CN8330 Datasheet, PDF (97/101 Pages) Conexant Systems, Inc – DS3/E3 Framer with 52 Mbps HDLC Controller

B
Appendix B
This appendix describes the various non-conformances associated with this
device.
B.1 DS3CKI Clock Duty Cycle
Conexant recommends a 60/40 percent duty cycle maximum for the DS3CKI
input.
B.2 Overhead Bit Insertion in E3 Parallel Payload
Mode
When the framer is operated in E3 Parallel Payload mode with external overhead
insertion enabled, the receive byte clock does not provide pulses where the
overhead bits are inserted.
Workaround: An external hardware circuit can be constructed to provide a
continuous byte clock synchronous to the receive byte clock. Contact the
Conexant applications department for circuit details.
100441E
Conexant
B-1