STLC5411FN datasheet(36/72 Pages) STMICROELECTRONICS

36 / 72 page

ways to enter quiet mode: QM bit in CR6 register

and QM primitive command to write in TXACT

clear quiet mode.

AUTOMODE

For all auto mode configurations, AIS pin allows a

choice of line interface: 27 or 15mH for the trans-

former and resistors line or device side.

In NT1, the activation/deactivation state machine

and the automatic power-up / power-down capa-

bilities of the UID provide for a direct connection

through GCI between UID and SID-GCI (ST

5421) without the need of an extra microcontroller

(see figure 13b). LSD- pin of SID-GCI must be con-

nected together to the Bx input pin of UID to ensure

autonomous power-up/down control. Activation/De-

activation commands and indications are trans-

ferred from one device to the other by means of the

C/I channel. Maintenance functions are automat-

ically processed in UID. Therefore, there is not

transfer of messages on the Monitor channel be-

tween UID and SID-GCI. Please note that the

2B+D loop-back request at the S interface is pro-

vided using the C/I channel code ARL and that

there is not automatic processing of S and Q mes-

sages in SID-GCI.

In Repetor, the same advantages provide for a di-

rect connection through GCI between both UID

without the need of an extra microcontroller (see

figure 13c). As for NT1, C/I channel transfers acti-

vation/deactivation commands and indications.

Maintenance functions are automatically proc-

essed in UIDs, needing the transfer of eoc mes-

sages, overhead bits and CRC fault detections.

This is performed autonomously on the Monitor

channel by sending when required messages in a

regular format as already described.EOC mes-

sages are transmitted according to Table 5; over-

head bits in the M4 channel excluding (act, dea,

uoa and sai) transferred transparently; spare

overhead bits in M5 or M6 bit positions are also

transferred transparently; febe and nebe bits are

transmitted according to Figure10.

COMMAND INDICATION (C/I) CODES

Activation, deactivation and some special test

functions can be initiated by the system by writ-

ing in TXACT register. Any status change of the

on-chip state machine is indicated to the system

by the UID by setting a new code in the RXACT

RXACT registers are normally associated with the

C/I channel (it is possible to associate them with

the MONITOR channel thank to the CID bit in

CR2 register). All commands and indications are

coded on four bits: C1, C2, C3, C4. Codes are

listed in Table 7. For each mode, a list of recog-

nized commands and generated indications is

given. Hereafter, you have a detailed description

of the codes depending on mode selected.

NT mode: Command

0000 (PUP): Power Up

When in the power down state, PUP command

powers up the device ready for a cold or a warm

start. When GCI is selected with clocks as out-

puts, PUP command is replaced by pulling low Bx

input pin.

0001 (RES): Reset

RES command resets UID ready for a cold start.

Configuration registers are not changed. RES can

be operated when the device is either powered up

or down.

If RES command is applied when the line is not

fully deactivated, UID properly ends the activation

before to come back in H1 state; In this case DP

or EIU indication is returned (Auto mode configu-

ration or not respectively).

0010 (SP1): Send Single Pulse +1 and -1

SP1 test command forces UID to send +1, -1,

pulses to the line, one pulse per frame.

0011 (RDT): Random Data Transmitted

RDT test command forces UID to send data with

random equiprobable levels at 80 kbaud.

0100 (EIS): Error Indicate S Interface

EIS command reports on the U line, a default on

the S interface.

0101 (PDN): Power Down

PDN command forces UID to power down state. It

should normally be used after UID has been set

in a known deactivated state, e.g. in an NT after a

DI status indication has been reported. In GCI, C/I

indication (DI) is sent twice on Br output before

UID powers down.

0110 (UAI): U interface Activation Indicate

UAI command is significant only when RR bit is

set equal one in CR2 register or if NT-RR-AUTO

auto-mode is selected. After the receiver has

been super-frame synchronized, UAI command

allows UID to send SN3 signal to the line.

0111 (QM): Quiet Mode

In this mode, UID does not react to any line status

change. UID can be powered up or down and

ready for a cold start or a warm start. All configu-

ration registers and coefficients remain un-

changed. Quiet Mode is disabled by any other

command.

Note: Inside UID, an logical or is implemented

with this QM primitive and the QM bit in CR6 reg-

ister.

1000 (AR): Activation Request

Beeing in the Power Up and deactivated state

STLC5411

36/72

STLC5411FN 数据表(PDF) 36 Page - STMicroelectronics

STLC5411FN 数据表(HTML) 36 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

数据表下载