參數(shù)資料
型號(hào)： STLC5412FN
廠商： 意法半導(dǎo)體
英文描述： 2B1Q U INTERFACE DEVICE ENHANCED WITH DECT MODE
中文描述： 2B1Q U接口裝置加強(qiáng)與無繩模式
文件頁數(shù)： 40/74頁
文件大?。?/td> 655K
代理商： STLC5412FN
(H1), AR instruction forces UID through the ap-
propriate sequence to activatethe line by sending
TN followed by SN1. Beeing in the U-only-active
state (H8A), AR command forces the sai bit equal
1 to the line. It is intended to transfer to the net-
work an activationattempt at the S/T interface.
1011 (SP3):
SendSingle Pulse +3 and -3
SP3 test command forces UID to send +3, -3
pulses to the line,one pulse per frame.
1100 (AI):
ActivationIndicate
AI command forces act bit equal one in SN3 sig-
nal transmitted to the line. It reflects an activated
state at the S/Tinterface.
1110 (AIL):
ActivationIndicate Loopback
Identical to AI command. Ensure direct compati-
bility withstatus indicationsof SID-GCI.
1111 (DI):
DeactivationIndicate
The DI command allows the UID to automatically
enter the power down state if the line is deacti-
vated. DI command has no effect as long as the
line is not deactivated (DI status indication re-
ported).
NT mode: Status indication
0000 (DP/LSD):
Deactivation Pending / Line Sig-
nal Detected
When in the deactivated state (H1) either pow-
ered up or down, LSD status indication is re-
ported if TN wake-up tone is detected except if
NT1 AUTO is selected; in this configuration, UID
must check uoa bit before to send (or not) LSD.
When in the superframe-synchronized states,DP
status indication reports that the dea bit has been
received equal zero from the line. UID enters in
the receive reset state. When NT1-AUTO mode is
selected, DP status indication is reported also
when a transmission error has been detected on
the loop. This is intended to ensure immediate
deactivationof the S/T interface.
0001 (EIU):
Error IndicationUser
EIU status indication is reported in following
cases:
a. to acknowledge RES command. UID is deacti-
vated,ready for a coldstart.
b. to report a Loss of signal for more than 480ms
on the line.
c. to report a Loss of synchronization for more
than 480ms on the line.
d. to report that an expire of 15s Timer interrupt
has reset UID ready for a cold start.
When NT1-AUTO is selected, EIU is replaced by
DP.
0100 (EI):
Error Indication
EI status indication reports that act bit has been
detected equal zero.
0110 (UAP):
U interfaceActivation pending
Is significant only when RR bit in CR2 has been
set equal one or if NT-RR-AUTO mode is se-
lected. UAP reports that the receiver is super-
frame synchronized with uoa bit received equal
zero.
1000 (AP):
ActivationPending
AP reports that the receiver is superframe syn-
chronizedwith uoa bit received equal one .
1010 (ARL):
ActivationRequestLoopback
Is significant only when NT1-AUTO or NT-RR-
AUTO mode is selected. ARL reports that an eoc
message has been received requiring to operate
a local 2B+D loopback. When connected to SID-
GCI in a NT1 or to UID in LT-RR-AUTO mode in
a regenerator,2B+D loopback command is there-
fore automaticallyprovided.
1100 (AI):
ActivationIndication
AI reports that UID is superframe synchronized
with act and uoa bits received equal one.
1111 (DI):
DeactivationIndication
DI reports that UID has entered the deactivated
state (H1).
LT mode: Command
0000 (PUP/DR):
Power Up / Deactivation Re-
quest When in the power down state, PUP com-
mand powers up the device ready for a cold or a
warm start. When in one of the superframe syn-
chronized states, DR command forces dea bit on
the line equal zero for four consecutive superfra-
mes before ceasingtransmission.
0001 (RES):
Reset
RES command resets UID ready for a cold start.
Configurationregisters are not changed. RES can
be operatedwhen the device is either powered up
or down. If RES command is applied when the
line is not fully deactivated, UID returns EIU indi-
cationand goes in J1 state (Receive Reset).
If RES command is applied when the line is not
fully deactivated,UID properly ends the activation
before to come back in J1 state; in this case EIU
indication is returned.
0010 (SP1):
SendSingle Pulse +1 and-1
SP1 test command forces UID to send +1, -1,
pulses to the line, one pulse per frame.
0011 (RDT):
RandomData Transmitted
RDT test command forces UID to send data with
random equiprobablelevels at 80 kbaud.
0100 (FA0):
Force act bit to 0
FA0 command forces the act bit to 0 in the SL3
signal transmitted to the line. It is intended to re-
flect a transmission failure detected on the net-
work side of the loop relative to UID.
0101 (PDN):
Power Down
PDN command forces UID to power down state. It
should normally be used after UID has been set
STLC5412
40/74
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