PM5344 datasheet(41/212 Pages) PMC

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PM5344 SPTX

DATA SHEET

PMC-930531

ISSUE 6

SONET/SDH PATH TERMINATING TRANSCEIVER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

inv_point:

not any of above (i.e., not norm_point, and not NDF_enable,

and not AIS_ind, and not inc_ind and not dec_ind)

new_point:

disabled_NDF + ss + offset value in range of 0 to 782 but not

equal to active offset

inc_req:

disabled NDF + ss + majority of I bits inverted + no majority

of D bits inverted

dec_req:

disabled NDF + ss + majority of D bits inverted + no majority

of I bits inverted

Note 1.-

active offset is defined as the accepted current phase of the

SPE (VC) in the NORM_state and is undefined in the other

states.

Note 2 -

enabled NDF is defined as the following bit patterns: 1001,

0001, 1101, 1011, 1000.

Note 3 -

disabled NDF is defined as the following bit patterns: 0110,

1110, 0010, 0100, 0111.

Note 4 -

the remaining six NDF codes (0000, 0011, 0101, 1010,

1100, 1111) result in an inv_point indication.

Note 5 -

ss bits are unspecified in SONET and has bit pattern 10 in

SDH

Note 6 -

the use of ss bits in definition of indications may be

optionally disabled.

Note 7 -

the requirement for previous NDF_enable, inc_ind or

dec_ind be more than 3 frames ago may be optionally

disabled.

Note 8 -

new_point is also an inv_point.

Note 9 -

LOP is not declared if all the following conditions exist:

the received pointer is out of range (>782),

the received pointer is static,

PM5344 Datasheet(PDF) 41 Page - PMC-Sierra, Inc

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