PM5357 datasheet(40/432 Pages) PMC

40 / 432 page

PRODUCTION

S/UNI-622-POS

PMC-Sierra, Inc.

PM5357

S/UNI-622-POS

DATASHEET

PMC-1980911

ISSUE 5

SATURN USER NETWORK INTERFACE (622-POS)

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

9.3

Clocks and Alarms Signals

Pin Name

Type

No.

Function

RCLK

Output

AC20

The receive clock (RCLK) provides a timing reference

for the S/UNI-622-POS receive function outputs.

RCLK is a 77.76 MHz, 50% duty cycle clock.

RFPO

Output

AB19

The receive frame pulse output (RFPO), when the

framing alignment has been found (the OOF register

bit is low), is an 8 kHz signal derived from the receive

clock RCLK. RFPO pulses high for one RCLK cycle

every 9720 RCLK cycles (STS-12c / STM-4-4c).

RFPO is updated on the rising edge of RCLK.

RALRM

Output

AA19

The receive alarm (RALRM) output indicates the state

of the receive framing. RALRM is low if no receive

alarms are active. RALRM is optionally high if line

AIS (LAIS), path AIS (PAIS), line RDI (LRDI), path

RDI (PRDI), enhanced path RDI (PERDI), loss of

signal (LOS), loss of frame (LOF), out of frame

(OOF), loss of pointer (LOP), loss of pointer

concatenation (LOPC/AISC), loss of cell delineation

(LCD), signal fail BER (SFBER), signal degrade BER

(SDBER), path trace identification mismatch (TIM) or

path signal label mismatch (PSLM) is detected .

RALRM is an asynchronous output with a minimum

period of one RCLK clock.

TCLK

Output

B19

The transmit clock (TCLK) provides timing for the

S/UNI-622-POS transmit function operation. TCLK is

a 77.76 MHz, 50% duty cycle clock.

TFPO

Output

A20

The active-high framing position output (TFPO) signal

is an 8 kHz signal derived from the transmit clock

TCLK. TFPO pulses high for one TCLK cycle every

9720 TCLK cycles (STS-12c / STM-4-4c).

TFPO is updated on the rising edge of TCLK.

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