CN8330 Datasheet, PDF (55/101 Pages) Conexant Systems, Inc – DS3/E3 Framer with 52 Mbps HDLC Controller

CN8330
DS3/E3 Framer with 52 Mbps HDLC Controller
2.0 Functional Description
2.4 Receiver Operation
2.4.10 Serial C-Bit Output
All received C-bits are output on the CBITO pin on the rising edge of
RXCCK/TZNRZ in DS3 mode. This allows external circuitry to examine
individual C-bits if necessary. The timing is shown in Figure 2-15.
The received N-bits are output on the CBITO pin on the rising edge of
RXCCK/TZNRZ in E3 mode. This allows external circuitry to process the N-bit
if necessary. The relative timing is the same as in DS3 mode except there is only
one N-bit per frame.
Figure 2-15. C-Bit Output Timing
RXCCK/TXNRZ
CBITO C1 C2 C3 C1 C2 C3 C1 C2 C3 C1 C2 C3
Subframe 6
Subframe 7
Subframe 1
Subframe 2
100441E
Conexant
2-33