參數(shù)資料
型號: PSB21911
廠商: SIEMENS A G
元件分類: 數(shù)字傳輸電路
英文描述: ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE
中文描述: DATACOM, ISDN ECHO CANCELLER
文件頁數(shù): 159/164頁
文件大?。?/td> 1401K
代理商: PSB21911
Semiconductor Group
159
11.97
PSB 21911
PSF 21911
Appendix
Table 31
State Machine Input Signals
No.
1
Signal name
PMODE
Description
Corresponds to the PMODE pin. Set to "1" (only) in the
microprocessor mode
This input is set to "1" (only) in the TE mode
"1" on this input indicates receiver synchronization (e.g. in
the Transparent state, see IEC-Q V4.3 User‘s Manual
02.95, page 175).
SWST:BS bit.
SWST:SGL bit.
ADF:CBAC bit.
This input indicates that the EOC code 25h (stop) was
received on the U interface.
This input indicates that the EOC code 27h (go) was
received on the U interface.
A 500 micro seconds timer is enabled.
The 500 micro seconds timer (see 9) has expired.
The timer TD1 is enabled. This timer depends on the
position of the EOC frame in the currently received U data.
It varies between 7.5 and 15 ms.
The timer TD1 has expired. This timer depends on the
position of the EOC frame in the currently received U data.
It varies between 7.5 and 15 ms.
BAC bit on DIN. This is bit no. 27 positioned in the third
IOM slot
2
3
TE
ACT
4
5
6
7
BS
SGL
CBAC
EOC=25
8
EOC=27
9
10
11
T1 set
T1 expired
TD1 set
12
TD1 expired
13
BAC
Table 32
State Machine Output Signals
No.
1
Signal name
SG
Description
Value of the S/G bit on DOUT. The S/G bit is bit no. 27 in
the third slot on DOUT. SG=Z Means that the SG bit has
the value high Z
Sets the D channel upstream to "0" if active ("1")
2
D0
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