STLC5460 datasheet(30/54 Pages) STMICROELECTRONICS

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RECEIVE COMMAND/INDICATE STATUS REGISTER (RCIS)

EVENT

RRP

OVR

After Reset 00 (H)

EVENT

EVENT = 1.

A primitive has been received twice identically. The number of Command/Indicate

channels is give by MO, G2, G1, G0.

RRP

Read Receive Primitive

RRP = 1 the mp has to read the primitive received in order to allow the next on to be

processed.

OVR

OVERRUN

OVR = 1. The previous primitive has not been read by the microprocessor.

If MO = 0, Multiplex 0

if MO = 1, Multiplex 1.

G 0/2

GCI 0 to GCI 7 channel of each multiplex.

TEST REGISTER (TEST)

FWD

WITG

DCA

SAV

PRSC

DCG

SGV

After Reset 00 (H)

FWD

False Word Detection

FWD = 1, the counter indicates the number of wrong bytes

FWD = 0, the counter indicates the number of wrong bits.

WITG

Word integrity.

WITG = 1. The first bit of the Pseudo Random Sequence (2*11-1) is the firstbit of the

channel (or subchannel) selected in the Time Slot at the beginning of the transmission.

‘

WITG = 0. The first bit of the PRS is transmitted without taking into accountthe place

in the Time Slot.

DCA

Double channel for analyser.

DCA = 1. The analyser receives Pseudo Random Sequence from two channels.

DCA = 0. The analyser receives Pseudo Random Sequence from one channel.

SAV

Sequence Analyser Validation. When this bit goes to ”1”, the Analyser of Pseudo

Random Sequence (2*11-1) is connected instead of Extract A Register i f DCA = 0,

instead of Extract A and Extract B registers if DCA = 1. Then the synchronisation is

researched.

When SAV = 0, the analyser is initiated.

NB : When DCA= 0, Insert B register can be used normally.

Loopback.

When LP = 1, the six data streams going out (PCM 0/3 and MUX 0/1) are respectively

connected instead of data stream coming from the 6 inputs (PCM 0/3 and MUX 0/1).

The loopback is transparent or not, depending on M0D,M1D, P0E, P1E, P2E, P3E

bits of Multiplex and PCM Configuration Registers.

PRSC

Pseudo Random Sequence Corrupted.

When this bit changes from 0 to 1, one PRS bit is corrupted if DCG = 0, two PRS bits

are corrupted if DCG = 1 (one bit in each channel). After transmitting corrupted bit(s),

PRSC changes from ”1” to” 0”.

DCG

Double channel for Generator.

DCG = 1. The generator transmits Pseudo Random Sequence to two channels.

DCG = 0. The generator transmits Pseudo Random Sequence to one channel.

SGV

Sequence Generator Validation.

When this bit goes to ”1”, the generator provides Pseudo Random Binary Sequence

2 * 11-1 in accordance with CCITT Recommendation O.152. The generator is

STLC5460

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