st5451d STMicroelectronics, st5451d Datasheet - Page 43

• Manufacturer Part Number: st5451d
• Description: 2b1q U Interface Device
• Manufacturer: STMicroelectronics

NTS LT / NT mode Select.
NTS = 0: LT mode selected
NTS = 1: NT mode selected
DMO D channel Transfer mode Select.( W/DSI
only)
Significant only when DEN=1.
T24D: 24ms timer desable (GCI only).
DEN D channel port Enable. ( W/DSI only)
CID: C/I channel desable (GCI only).
ETC 2B+D Data Extended Transparency channel.
SFS = 0: SFSx is an input that synchronizes the
SFS = 1: SFSx is an output indicating the
DMO = 1: D channel data is shifted in and out on
DMO = 0: D channel data is shifted in and out on
T24D = 1: The timer watches at the exchange on
T24D = 0: The timer is desable. This means for
DEN = 0: D channel port disabled. D bits are
DEN = 1: D channel port (DX, DR, and DCLK
CID = 0: TXACT and RXACT registers only
CID = 1: All registers only accessible via the
ETC = 1: 2B+D
transmit superframe.
Transmit Superframe. In NT mode
SFSx is always an output.
Dx and Dr pins in continuous mode at
16 kbit/s on the falling and rising
edges of DCLK respectively.
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.
accessible via the C/I channel.
Others registers only accessible via
MONITOR channel.
MONITOR channel.
enabled as soon as the line is
superframe synchronized.
MONITOR channel every time the UID
sends new byte. If it expires before
pre-acknoledgement,
message is generated; In this last
case, the aborted message is lost.
instance that UID may wait an pre-
acknoledgement for ever.
transferred on Br and Bx; Multiplexed
mode is selected automatically.
when DMO bit equal 1) is selected. D
bits are transferred on Dr and Dx in a
mode depending on DMO bit setting.
channel
transparency
an
abort
is
BP1 Break Point 1 during activation(significative
only when NTS = 0: LT mode) .
EIF Error Indication Filter.
Significant in NT mode only
BP2 Break Point 2 during activation. Significant
only when NTS=0 (LT selected)
BFH9D: Back from H9 disabled. (Significant in NT
mode only)
RR Repetor mode.
ETC = 0: 2B+D channel transparency is under
BP1 = 1: During an activation attempt from the
BP1 = 0: The
EIF = 0: act bit is set to zero in the transmit
EIF = 1: act bit may be not set to zero in the
BP2 = 1: During a full activation procedure, UID
BP2 = 0: The activation procedure described
BFH9D = 0: UID
BFH9D = 1: UID
RR = 0: UID
receiving
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.
above
without the need of an AI command.
with the standard requirements for NT1
or LT equipment depending on NTS bit
select. See state matrix for the detailed
behaviour of UID.
superframe in case of EI command,
even if EI is sent sporadically.
transmit superframe in case of EI
command with a duration of less than
36ms.
loop, (before SL2 sending) UID waits
for an AR command to
activation. It is recommended to set
BP1 equal 1 for repetor application.
automatically processed without the
need of an AR command.
control of the on-chip state machine:
act bit equal one both directions.
deactivation) after reception of dea
bit = 0. It is waiting a loss of signal to
return in H1 state via H12.
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.
activation/deactivation complies
activation
is
is
is
act bit set to one in the
automatically
in
H9
H9
procedure
state
state
STLC5411
processed
(pending
(pending
pursue
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is