PM7344 datasheet(119/293 Pages) PMC

119 / 293 page

PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

103

Registers 017H, 117H, 217H and 317H: ALMI Alarm Detection Status

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

Unused

Bit 5

Unused

Bit 4

Unused

Bit 3

Unused

Bit 2

REDD

Bit 1

YELD

Bit 0

AISD

These registers indicate the presence or absence of one or more T1 OOF

occurrences within the last 40ms; the presence or absence of T1 yellow alarm

over the last 40ms; and indicate the presence or absence of the AIS signal over

the last 60ms.

REDD:

When REDD is a logic 1, one or more T1 out of frame events have occurred

during the last 40ms interval. When REDD is a logic 0, no out of frame events

have occurred within the last 40ms interval.

YELD:

When YELD is logic 1, a valid yellow signal was present during the last 40ms

interval. When YELD is logic 0, the yellow signal was absent during the last

40ms interval. For each T1 framing format, a valid YELLOW signal is

deemed to be present if:

• bit 2 of each channel is not logic 0 for 16 or fewer times during the

40 ms interval for the SF framing format;

• the 16-bit yellow bit oriented code is received error-free 8 or more

times during the interval for the ESF framing format with a 4 kHz

data link;

• the 16-bit yellow bit oriented code is received error-free 4 or more

times during the interval for the ESF framing format with a 2 kHz

data link.

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