參數(shù)資料
型號: 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): 119/161頁
文件大?。?/td> 1865K
代理商: CN8223EPF
CN8223
3.0 Registers
ATM Transmitter/Receiver with UTOPIA Interface
3.7 Status Register Overview
100046D
Conexant
3-33
Defined in ITU Recommendation G.775.
Table 3-15
lists definitions for E3 G.751 LINE_STATUS bits.
Table 3-15. E3 G.751 LINE_STATUS Bit Definitions
Bit
G.751 E3
Description
15
0
Not used
14
One-Second Count
Set if the one-second timer input is detected.
13
Invalid FEBE
Set if an invalid FEBE is detected (9
F).
12
FEBE All-1s
Set if an invalid FEBE = F is detected.
11
PLCP FEBE Error
Set if any valid non-0 FEBE value (values 0x1
0x8) is detected in the G1 octet in 57-octet PLCP
formats
10
PLCP BIP Error
Set if there is an error in the BIP-8 code (B1 octet) checking in 57-octet PLCP formats.
9
PLCP Frame Error
Set if there is an error in either the A1 or A2 octets of the PLCP frame pattern for 57-octet PLCP
formats.
8
PLCP Yellow
PLCP yellow indicates that the yellow alarm bit in the G1 octet (57-octet modes) has been
active for 10 consecutive PLCP frames.
7
PLCP LOF 2
3
Set if PLCP LOF is high for three consecutive one-second latching signals (rising edge on
ONESECI).
6
PLCP LOF
Set when PLCP OOF is active for eight consecutive PLCP frames.
5
PLCP OOF
Set if the PLCP OOF state has been entered for 57-octet PLCP formats.
4
E3 A-bit Yellow
Set if the internal E3 framer detects the A-bit high in a G.751 E3 frame.
3
x
Not used
2
E3 AIS
E3 alarm signal. Indicates an unframed all-1s signal present for two consecutive frames.
1
E3 OOF
Out of Frame. Indicates four consecutive incorrect FAS patterns.
0
LOS (Input)
Set if there is a LOS detected by the internal B3ZS/HDB3 decoder or if the RXLOS~ input pin is
active low. Internal LOS detection is the occurrence of 175
±
75 zeros prior to B3ZS/HDB3
decoding. The RXLOS~ input pin should be tied high unless an external line interface unit
provides an active low LOS indication.
NOTE(S):
x
= Bit position is undefined and should be ignored.
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