tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 474

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
20 M13/M23 MUX/DeMUX Block Functional Description
20.11.7 Output Select Logic
DS2 Output Selection. The M23 demultiplexer outputs are fed into seven DS2 output selection logic blocks. This
allows the M13 to output the demultiplexed DS2 signals or insert AIS.
Each selector is identified by a number y that ranges from one to seven and corresponds directly to M13 outputs
M13_DS2DATA[7—1]. The outgoing DS2 signals are retimed by an associated clock, M13_DS2CLK[7—1]. The
edge of the clocks that is used to retime the data is provisionable to either the rising edge (M13_TDS2_EDGE = 1
(Table
The output from each selection block is controlled by the values of bits M13_DS2_OUT_IDLEy
M13_DS2_OUT_AISy
The all ones DS2 AIS signal is also output under all failure conditions at DS3 level which require automatic AIS
insertion at DS2 level.
DS1/E1 Output Selection. The M12 demultiplexer outputs are fed into 28 DS1/E1 output selection logic blocks.
This allows the M13 to output the demultiplexed DS1/E1 (M13_DS1_OUT_AISx = 0
(M13_DS1_OUT_AISx = 1). The all ones AIS signal is also output under all failure conditions at DS3 or DS2 level
which require automatic AIS insertion at DS1/E1 level.
Each selector is identified by a number x that ranges from 1 to 28 and corresponds directly to a block output
M13_DS1DATA[28—1]. The outgoing DS1 and/or E1 signals are retimed by an associated clock,
M13_DS1CLK[28—1]. The edge of the clock that is used to retime the data is provisionable to either the rising
edge (M13_TDS1_EDGEx = 1
Each output selector number, x can be expressed as either 4y – 3, 4y – 2, 4y – 1, or 4y, where y ranges from 1 to
7. For a given y, the 4 selectors in the group output DS1 signals when M13_OUT_TYPEy = 1 (
signals when M13_OUT_TYPEy = 0. In either of these modes, the four selectors in the group are controlled by the
2-bit values OUTSELx, where x = 4y – 3, 4y – 2, 4y – 1, and 4y.
When M13_OUT_TYPEy = 0, the output of selector 4y is held low.
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Output is held low when M13_DS2_OUT_IDLEy = 1; otherwise, the deMUXed DS2 signal is output when
M13_DS2_OUT_AISy = 0 and DS2 AIS is output when M13_DS2_OUT_AISy = 1.
294)) or falling edge (M13_TDS2_EDGE = 0).
(Table
285).
(Table
272)) or falling edge (M13_TDS1_EDGEx = 0).
(continued)
(Table
273)), or insert AIS
Table
(Table
Agere Systems Inc.
272), or E1
284) and
May 2001