參數(shù)資料
型號(hào)： TP3410J304
英文描述： IC-ISDN TRANSCEIVER
中文描述： 集成電路- ISDN的收發(fā)器
文件頁(yè)數(shù)： 24/32頁(yè)
文件大?。?/td> 332K
代理商： TP3410J304
Functional Description
(Continued)
T4 or T5); it does not affect the Command Regis-
ters.
This command may be used on a fully activated
line to force the transmit “act” bit = 0, to indicate
loss or denial of 2B + D transparency to the NT
(LT state J7). To revert back to sending “act” = 1
use the AC command (with BP2 = 1).
S-Interface Error Indication, which should only be
used in an NT-1 when loss of received signal is
detected (i.e., INFO 0). This command forces the
upstream “act” bit (M41) = 0.
Deactivation Confirmation. This command may be
used as an alternative to PDN, to power-down the
device in response to a DI indication. It should not
be used prior to the DI indication.
FA0
SEI
DC
*
11.3 Activation Indication Register: (READ ONLY)
Byte 2
7
6
5
4
3
2
1
0
0
0
0
0
C4
C3
C2
C1
Activation Indicators are coded the same as for the Activa-
tion Control Register. In Microwire mode only, at each activa-
tion status change the four significant bits in this register are
sent to the Interrupt stack. If multiple interrupt conditions
should arise simultaneously, this register has the highest pri-
ority and will be read first.
11.4 Activation Status Indicators
DP/LSD When the TP3410 is deactivated, either powered
up or powered down, the Line Signal Detector sets
this indicator if it detects an incoming 10 kHz
wake-up tone. If the device is powered down the
LSD pin is also pulled low. In NT mode only, this
code also functions as a Deactivation Pending in-
dicator when “dea”=0 is validated.
SYNC
In LT mode only this indicates when superframe
sync is detected, and should be used to stop the
external default timer.
AP
Activation Pending, which is used in NT mode to
indicate when superframe sync has been acquired
and the BCLK and FS outputs are synchronized to
the received line signal. In LT mode, the Line Sig-
nal Detector sets this indicator if it detects an in-
coming 10 kHz wake-up tone.
AI
This Activation Indication code indicates that the
loop is fully activated, (“act” = 1 has been re-
ceived), and the 2B+D channels are enabled for
data transfer. In LT mode, however, if Breakpoint
#
2 is enabled via CR2, it is necessary to respond
to AI with an AC command. This will cause the de-
vice to set “act”=1 in the transmit frame and open
the 2B+D channels for data transfer.
EI
Loss of frame synchronization will set this Error In-
dicator and inhibit the 2B+D channel data. If a re-
ceived line signal can still be detected the device
will attempt to recover synchronization for up to
480 ms; if this fails it will enter the RESET state
and generate a DI. The EI indication is also gener-
ated on an activated line if the received “act” bit
changes from 1 to 0, indicating loss of tranparency
at the far-end.
DI
The Deactivated Indication, which confirms that
the loop has been deactivated by means of a De-
activate Request at the LT, and has entered the
RESET state. DI
*
is effective in GCI mode only.
In GCI mode only, TIM is an acknowledgment
when the device is in the power-down state and
receives a PUP command.
TIM
11.5 Cold Start and Warm Start
When power is first applied to the device, the first AR com-
mand will always initiate a cold-start sequence, which may
take up to 15 seconds for complete activation. If the device is
subsequently deactivated using the correct procedure, and
provided power is maintained uninterrupted in either the
power-up or power-down state, the next AR instruction auto-
matically sequences through the warm-start procedure,
which normally achieves complete loop activation within 300
ms.
The device includes the specified timers of 15s, 480 ms and
40 ms at the appropriate phases of the activation and deac-
tivation sequences. For applications requiring a default
time-out other than 15s the internal timer can be disabled to
allow an external timer to be used.
11.6 LT Mode Activation/Deactivation
If activation is initiated by the downstream (NT mode) end
with the device either powered up or down, an AP Interrupt
condition will be generated on detection of the 10 kHz
“wake-up” tone. The Activation Indication Register will show
this condition and, if the device is powered down, the LSD
pin will be pulled low.
Prior to initiating activation all registers must be programmed
appropriately and the device must then be powered up. The
use of the commands and status indicators is the same
whether activation is initiated locally or from the remote end.
An AR command is required to enable the device to proceed
with the activation sequence. An internal 15s default timer is
also started (in North America the timer value should be 15
seconds if a single loop section is being activated). Please
see TP3410 User’s Manual for additional information on ac-
tivation and deactivation.
The sequence continues automatically until superframe syn-
chronization is acquired on the SN3 signal received from the
NT. At this point the “act” bit is set = 1 in the downstream di-
rection, and the AI Interrupt is generated in the Activation In-
dication Register. The loop is then fully activated, with all
channels in the data stream available for use.
If activation is not successfully completed before expiry of
the 15s timer, the device generates an EI followed by a DI
fault indication and ensures that the Activation Sequencer
returns to the Full Reset state (J10 to J1) prior to any reat-
tempt to activate.
For additional control over the activation sequence, a break-
point state may be enabled at the LT. BP2 will halt the se-
quence when the loop is fully synchronized, receiving SN3,
but the “act” bit is held = 0; this state prevents the S/T Inter-
face from becoming fully activated (the NT1 will maintain
INFO2 towards the TEs). An AC command will release this
state, allowing activation to be completed. The BP2 bit in
Register CR2 controls the enabling of this breakpoint.
Deactivation is initiated by writing the DR command in the
Activation Control Register, causing “dea”=0 to be transmit-
ted towards the NT. When the NT ceases to transmit, confir-
mation of deactivation is provided by a DI Status indicator.
PrintDate=1997/07/09 PrintTime=13:38:42 1109 ds009151 Rev. No. 1
Proof
24
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TP3410J-304 制造商:Texas Instruments 功能描述:ISDN LINE INTERFACE, BASIC, 28 Pin, Ceramic, DIP
TP3410J304/NOPB 功能描述:IC TRANSCEIVER MONOLITHIC 28CDIP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR)
TP3410J304-X 功能描述:IC TXRX ISDN BASIC ACC 28-CERDIP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR)
TP3410N304 制造商:OC White Company 功能描述:ISDN U HDLC Interface 1-Line 160Kbps 5V 28-Pin CDIP
TP3420A 制造商:NSC 制造商全稱:National Semiconductor 功能描述:ISDN S/T Interface Device
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