cn8223 Mindspeed Technologies, cn8223 Datasheet - Page 44

• Manufacturer Part Number: cn8223
• Description: Atm Transmitter/receiver With Utopia Interface
• Manufacturer: Mindspeed Technologies

2.0 Functional Description
2.2 Line Framers
Figure 2-9. DS3 Interface Transmit Timing
2-10
TXDATO
TXCKI
TXSYI
frequency of 44.736 MHz. TXSYI (active low) is sampled on falling clock
transitions, and TXDATO changes on falling clock edges. TXSYI has a rising
edge after the sampling of the overhead bit (once every 85 bits). TXDATO is the
output signal; it transitions in response to the falling edge of TXCKI, and can be
sampled on the following falling edge. This timing is compatible with the
Conexant Bt8330B DS3/E3 framer, using the TXOVH output of that circuit to
synchronize the CN8223 input. The content of the frame bit position is
undefined.
Figure 2-9
Information Field
illustrates the transmit timing for the DS3 interface. TXCKI has a
Conexant
Frame Bit Position
X
ATM Transmitter/Receiver with UTOPIA Interface
Information Field
100046D
CN8223