參數(shù)資料
型號(hào): CN8223EPF
英文描述: ATM/SONET TRANSCEIVER|CMOS|QFP|160PIN|PLASTIC
中文描述: 的ATM / SONET的收發(fā)器|的CMOS | QFP封裝| 160PIN |塑料
文件頁數(shù): 57/161頁
文件大?。?/td> 1865K
代理商: CN8223EPF
data octet on the TXDAT output. This could be used for marking all of the
overhead (non-ATM payload) octets in a data stream.
Alternatively, TXOD can be held low and a gapped octet clock provided from
the external circuitry to the CN8223 on TXCKI. TXDAT is the output signal; it
transitions in response to the rising edge of TXCKI, and can be sampled on the
following falling edge externally. TXDELO also transitions in response to the
rising edge and marks the first octet of each 53-octet cell.
CN8223
2.0 Functional Description
ATM Transmitter/Receiver with UTOPIA Interface
2.5 Parallel Line Interface
100046D
Conexant
2-23
Timing information for TAXI mode is found in
Section 4.3.5
. Pin connections
for the TAXI chipset and the CN8223 are listed in
Table 2-14
.
2.5.2 Transmit Parallel Interface
Interface connections for the Transmit Parallel Interface mode are listed in
Table 2-15
. TXOD and TXDELO are mapped to TXIN and TXOUT[8],
respectively.
Figure 2-14
illustrates the transmit timing for the parallel interface.
TXCKI has a frequency of up to 20 MHz. In parallel mode, the synchronization
signal TXOD marks the octet clocks where the CN8223 does not provide a new
Table 2-14. Pin Connections between TAXI Chipset and CN8223
Signal Name from TAXI Chipset
Connect to CN8223 Pin
Receive Clock (CLK)
RXCKI
Receive Data (DO 7-0)
RXIN[7:0]
Receive Command (CO 1)
TXIN
Receive Command Strobe (CSTRB)
RCV_HLD
Receive Violation (VLTN)
RXIN[8]
Transmit Clock (CLK)
TXCKI
Transmit Data (DI 7-0)
TXOUT[7:0]
Transmit Command (CI 1)
TXOUT[8]
Transmit Command (CI 0,2,3)
GND
Transmit Strobe (STRB)
TCLKO
Table 2-15. Transmit Parallel Interface Mode Connections
Signal Name
Connect to CN8223 Pin
Transmit Clock Input (TXCKI)
TXCKI
Transmit Octet Disable (TXOD)
TXIN
Transmit Data Output (TXDAT)
TXOUT[7:0]
Transmit Cell Delineation (TXDELO)
TXOUT[8]
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