BT8222EPFF CONEXANT [Conexant Systems, Inc], BT8222EPFF Datasheet - Page 40

• Manufacturer Part Number: BT8222EPFF
• Description: ATM Transmitter/Receiver with UTOPIA Interface
• Manufacturer: CONEXANT [Conexant Systems, Inc]

2.0 Functional Description
2.2 Line Framers
2.2.2 Internally Framed Receive Line Interface
Figure 2-5. Internal Framer Receiver Interface Timing
2-6
RXNEG
RXPOS
RXCKI
In internal framer mode, the receiver inputs are positive and negative pulse
indications, and the receive clock (and NRZ serial data if internal B3ZS/HDB3
decoding is disabled) comes from an external LIU.
The functional timing for the receive line interface is similar for all internal
framer modes.
B3ZS/HDB3 decoder is enabled. The RXPOS and RXNEG inputs are sampled on
the falling edge of the RXCKI clock input. Data inputs can be sampled on the
rising edge of the input clock by setting Invert RX Clock Sampling [bit 8] in
register CONFIG_3 [0x02].
Table 2-4. Internal Framer Receiver Interface Connections
Receive Clock Input (RXCKI)
Receive Positive Data (RXPOS)
Receive Negative Data (RXNEG)
Receive Loss of Signal (RXLOS~~)
Table 2-4
lists the interface connections for all of the internal framing modes.
Signal Name
Figure 2-5
Conexant
illustrates the interface timing when the internal
ATM Transmitter/Receiver with UTOPIA Interface
RXCKI
RXIN[1]
RXIN[2]
RXIN[4]
Connect to CN8223 Pin
100046C
CN8223