參數(shù)資料
型號: 28222-13
廠商: Conexant Systems, Inc.
英文描述: ATM Transmitter/Receiver with UTOPIA Interface
中文描述: 自動柜員機發(fā)射機/接收機的UTOPIA接口
文件頁數(shù): 91/161頁
文件大?。?/td> 1832K
代理商: 28222-13
CN8223
3.0 Registers
ATM Transmitter/Receiver with UTOPIA Interface
3.3 Configuration Control Registers
100046C
Conexant
3-5
7
1
Enable HEC
Alignment
Enables cell delineation via the HEC alignment method. This method is for use in any
mode where cells are directly mapped into the physical layer. When this bit is set,
53-octet cells are expected. When this bit is low, 57-octet cells (with PLCP framing
overhead) are expected.
6
1
Enable Parallel
Interface
Selects the parallel interface for input/output. When this bit is low, serial data is
expected; when high, parallel data is expected.
5
1
External Framer
Set if line framing is performed with an external framer. When this bit is low, the
internal framer for the selected mode will be used.
4
1
Disable B3ZS/HDB3
Bypasses the internal encoder/decoder so that NRZ data can be presented directly to
the internal framing functions. For E1 and DS1 in external framer mode, set to 0.
3
1
Unframed Input
Specifies whether the serial stream from an external circuit contains overhead or
only payload. The normal mode is framed mode. Physical layer overhead bits are
located by a synchronization input and are ignored by the PHY framer. In unframed
mode, all line framing bit positions are assumed to be nonexistent.
2
0
3
PHY Type
Sets the type of line framing and physical processing to be used. PHY modes are
always symmetric; the transmit and receive modes are identical. The PLCPs for DS1
and DS3 are described in TR-TSV-000773; E1 and E3 PLCPs are described in ETSI
draft standards prETS 300 213 and prETS 300 214; E3, DS3, and E4 direct-mapped
modes are described in ITU G.832; and STS-1 and STS-3c formats are described in
TR-NWT-000253.
Bit
Field
Size
Name
Description
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