參數(shù)資料
型號： 28233-11
廠商： CONEXANT SYSTEMS
元件分類： 數(shù)字傳輸電路
英文描述： ATM Transmitter/Receiver with UTOPIA Interface
中文描述： TRANSCEIVER, PQFP160
封裝： PLASTIC, MQFP-160
文件頁數(shù)： 44/161頁
文件大?。?/td> 1832K
代理商： 28233-11
2.0 Functional Description
CN8223
2.2 Line Framers
ATM Transmitter/Receiver with UTOPIA Interface
2-10
Conexant
100046C
Figure 2-9
illustrates the transmit timing for the DS3 interface. TXCKI has a
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. DS3 Interface Transmit Timing
Information Field
TXCKI
TXSYI
TXDATO
X
Frame Bit Position
Information Field
8
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