STLC5412FN datasheet(44/74 Pages) STMICROELECTRONICS

44 / 74 page

SFS = 0: SFSx is an input that synchronizes the

transmit superframe.

SFS = 1: SFSx is an

output indicating the

Transmit Superframe. In NT mode

SFSx is always an output.

NTS LT / NT mode Select.

NTS = 0: LT mode selected

NTS = 1: NT mode selected

DMO D channel Transfer mode Select.(

µW/DSI

only)

Significant only when DEN=1.

DMO = 1: D channel data is shifted in and out on

Dx and Dr pins in continuous mode at

16 kbit/s on the falling and rising

edges of DCLK respectively.

DMO = 0: D channel data is shifted in and out on

Dx and Dr pins in a TDM mode at the

BCLK frequency on the falling and

rising edges of BCLK respectively

when the assigned time-slots are

active.

T24D: 24ms timer disable (GCI only).

T24D = 1: The timer watches at the exchange on

MONITOR channel every time the UID

sends new byte. If it expires before

pre-acknoledgement,

abort

message is generated; In this last

case, the aborted message is lost.

T24D = 0: The timer is desable. This means for

instance that UID may wait an pre-

acknoledgement for ever.

DEN D channel port Enable. (

µW/DSI only)

DEN = 0: D channel port disabled. D bits are

transferred on Br and Bx; Multiplexed

mode is selected automatically.

DEN = 1: D channel port (DX, DR, and DCLK

when DMO bit equal 1) is selected. D

bits are transferred on Dr and Dx in a

mode depending on DMO bit setting.

CID: C/I channel disable (GCI only).

CID = 0: TXACT and RXACT registers only

accessible via the C/I channel.

Others registers only accessible via

MONITOR channel.

CID = 1: All registers only accessible via the

MONITOR channel.

ETC 2B+D Data Extended Transparency channel.

ETC = 1: 2B+D

channel

transparency

enabled as soon as the line is

superframe synchronized.

ETC = 0: 2B+D channel transparency is under

control of the on-chip state machine:

act bit equal one both directions.

BP1 Break Point 1 during activation(significative

only when NTS = 0: LT mode) .

BP1 = 1: During an activation attempt from the

loop, (before SL2 sending) UID waits

for

command

pursue

activation. It is recommended to set

BP1 equal 1 for repetor application.

BP1 = 0: The

activation

procedure

automatically processed without the

need of an AR command.

EIF Error Indication Filter.

Significant in NT mode only

EIF = 0: act bit is set to zero in the transmit

superframe in case of EI command,

even if EI is sent sporadically.

EIF = 1: act bit may be not set to zero in the

transmit superframe in case of EI

command with a duration of less than

36ms.

BP2 Break Point 2 during activation. Significant

only when NTS=0 (LT selected)

BP2 = 1: During a full activation procedure, UID

receiving

act bit set to one in the

received SN3 signal, UID waits for an

AI command to send act bit equal one

in SL3 signal. It is recommended to set

BP2 equal 1 for repetor application.

BP2 = 0: The activation procedure described

above

automatically

processed

without the need of an AI command.

BFH9D: Back from H9 disabled. (Significant in NT

mode only)

BFH9D = 0: UID

state

(pending

deactivation) after reception of dea

bit = 0. It is waiting a loss of signal to

return in H1 state via H12.

BFH9D = 1: UID

state

(pending

deactivation) after reception of dea

bit = 0. It is waiting a loss of signal to

return in H1 state via H12, or dea bit

= 1; In this last case UID returns in

the previous state.

RR Repetor mode.

RR = 0:

UID

activation/deactivation

complies

with the standard requirements for NT1

or LT equipment depending on NTS bit

select. See state matrix for the detailed

behaviour of UID.

STLC5412

44/74

STLC5412FN Datasheet(PDF) 44 Page - STMicroelectronics

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