SA9101 datasheet(1/40 Pages) SAMES

部件名	SA9101

功能描述	PCM FRAME ALIGNER

PDF	40 Pages

Scroll/Zoom	100%

制造商	SAMES [Sames]

网页	http://www.sames.co.za

标志

1 / 40 page

sames

SA9101

FEATURES

PCM FRAME ALIGNER

1/40

n

Frame alignment/synthesis for PCM30

double frame and CRC-multiframe

format.

n

Meets CCITT Rec.G704

n

Interface to route selectable between

HDB3 and fibre optical

n

HDB3 outputs switchable between fully

bauded and half bauded format

n

Error checking via CRC4 procedure

n

Insertion and extraction of alarms and

facility signals

n

Selectable system - clock (4096 kHz/

8192 kHz)

n

Selectable Interface mode (2048/4096

kBit/s) to system internal highway

n

Programmable offsets for receive and

transmit data

n

Two frame receive buffer for receive

route

clock

wander

and

jitter

compensation

n

Slip detection and direction indication

n

Extended HDB3 error detection

M71-1797

PDS039-SA9101-001

REV.A

09-09-94

DESCRIPTION:

The SA9101 (Frame Alignment unit for PCM30 Systems) is a C-MOS device which

implements the interface to PCM30 Transmission Systems.

In the receive direction, the device performs HDB3 decoding, Frame alignment

(selectable between doubleframe and CRC-Multiframe) and extraction of signalling

data.

Wander absorption between the PCM carrier and the system internal highway is

performed using an internal 2 frame memory. The incoming data stream is monitored

and

n

Error counters for code errors

(switchable to "S

i zeros counter"), frame

errors and CRC4 errors

n

Sub-multiframe assigned CRC Error

indication with possibility of automatic

insertion in Si-bit position of outgoing

multiframe.

n

Simplified data transfer between

SA9101 and controller, supported by

data stacks for receive and transmit

signalling data, selectable interrupt-

sources and DMA facilities.

n

Double frame marker for serial data

extraction support

n

Repeated transmission of signalling

data, if not updated.

n

Three transparent modes for timeslot 0

in transmit direction

n

Transparent mode for receive direction

n

HDB3 error indication

n

Idle channel data insertion selectable

for any timeslot

n

Channel loopback capabilities, test and

diagnostic capabilities

n

Parity checks

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