SA9101 Datasheet, PDF (1/40 Pages) Sames – PCM FRAME ALIGNER

sames
SA9101
PCM FRAME ALIGNER
FEATURES
n Frame alignment/synthesis for PCM30 n Error counters for code errors
double frame and CRC-multiframe
format.
(switchable to "S zeros counter"), frame
i
errors and CRC4 errors
n Meets CCITT Rec.G704
n Sub-multiframe assigned CRC Error
indication with possibility of automatic
n Interface to route selectable between
insertion in Si-bit position of outgoing
HDB3 and fibre optical
multiframe.
n HDB3 outputs switchable between fully _{n Simplified data transfer between}
bauded and half bauded format
SA9101 and controller, supported by
n Error checking via CRC4 procedure
data stacks for receive and transmit
signalling data, selectable interrupt-
n Insertion and extraction of alarms and
sources and DMA facilities.
facility signals
n Double frame marker for serial data
n Selectable system - clock (4096 kHz/
extraction support
8192 kHz)
n Repeated transmission of signalling
n Selectable Interface mode (2048/4096
data, if not updated.
kBit/s) to system internal highway
n Three transparent modes for timeslot 0
n Programmable offsets for receive and
in transmit direction
transmit data
n Transparent mode for receive direction
n Two frame receive buffer for receive ^{n HDB3 error indication}
route clock wander and jitter ^{n Idle channel data insertion selectable}
compensation
for any timeslot
n
Slip detection and direction indication
n
Channel loopback capabilities, test and
diagnostic capabilities
n Extended HDB3 error detection
n Parity checks
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 monitor₁e_/4d₀
a_Mn₇₁d_-1797
PDS039-SA9101-001
REV.A
09-09-94