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): 59/161頁
文件大?。?/td> 1832K
代理商: 28233-11
(ignored)
CN8223
2.0 Functional Description
ATM Transmitter/Receiver with UTOPIA Interface
2.5 Parallel Line Interface
100046C
Conexant
2-25
2.5.3 Receive Parallel Interface
Interface connections for the Receive Parallel Interface mode are listed in
Table 2-16
.
Figure 2-15
illustrates the receive timing for the parallel interface. In
parallel mode, data octets are provided on RXDAT[7:0] with an octet clock (up to
20 MHz) on RXCKI. The octet data is sampled on the falling edge of RXCKI.
The data inputs can be sampled on the rising edge of the input clock by setting
Invert RX Clock Sampling [bit 8] of CONFIG_3 [0x02]. An idle octet indicator
can be provided on RXOD as illustrated in
Figure 2-15
. The CN8223 ignores all
octets for which the RXOD input is high. This input can be used to mark framing
overhead (non-ATM payload) octets.
Table 2-16. Receive Parallel Interface Mode Connections
Signal Name
Connect to CN8223 Pin
Receive Clock Input (RXCKI)
RXCKI
Receive Octet Disable (RXOD)
RXIN[8]
Receive Data Input (RXDAT)
RXIN[7:0]
Figure 2-15. Receive Parallel Interface Timing
RXCKI
RXDAT[7:0]
RXOD
Data
Data
Data
Data
8
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