PM8313D3MX View Datasheet(PDF) - PMC-Sierra

Part Name

Description

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PM8313D3MX

M13 MULTIPLEXER

PMC-Sierra 

DATA SHEET

PMC-920702

ISSUE 5

PM8313 D3MX

M13 MULTIPLEXER

Pin Name

ROHCLK

ROH

ROHFP

RLOS

REXZ

Type Pin No. Function

Output

Output

Output

Output

21 The receive overhead clock (ROHCLK) cycles

once per overhead bit. ROHCLK is nominally a

526 kHz clock. ROOF, RFERF, RAIS, RIDL,

RFERR, ROH, and ROHFP are updated on the

falling edge of ROHCLK.

20 The receive overhead data (ROH) signal

contains the overhead bits (C, F, X, P, and M)

extracted from the received DS3 stream. ROH

is updated on the falling edge of ROHCLK.

19 The receive overhead frame position (ROHFP)

signal may be used to locate the individual

overhead bits in the received overhead data

stream, ROH. ROHFP is high during the X1

overhead bit position in the ROH stream.

ROHFP is updated on the falling edge of

ROHCLK.

22 The receive loss of signal (RLOS) status is set

high when the dual rail NRZ format stream is

selected, and 175 successive zeros are

detected on the RPOS and RNEG inputs.

RLOS is set low when the ones' density is

greater than 33% for 175 ± 1 bit periods on the

RPOS and RNEG inputs. RLOS is updated on

the falling edge of ROCLK.

Output

25 The receive excessive zero (REXZ) signal

indicates the presence of 3 or more

consecutive zeros in the received DS3 bipolar

stream. REXZ pulses high for one ROCLK

cycle whenever 3 or more consecutive zeros

are detected. When the Receive DS3 interface

is configured to for uni-polar data, the REXZ

output is forced low. REXZ is updated on the

falling edge of ROCLK.

16

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