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| 型號： | TP3410J304 |
| 英文描述： | IC-ISDN TRANSCEIVER |
| 中文描述： | 集成電路- ISDN的收發(fā)器 |
| 文件頁數(shù)： | 19/32頁 |
| 文件大?。?/td> | 332K |
| 代理商： | TP3410J304 |
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Functional Description
(Continued)
When DMO = 0, D channel data is shifted in and out on Dx
and Dr pins in a burst mode at the BCLK frequency when the
assigned time-slots are active, see Figures 10, 11, 12
DD: 2B+D Data Disabling
*
When DD = 0, 2B+D channel transfer is enabled as soon
as the line is completely synchronized.
When DD = 1, B and D channel transfer is inhibited. The
data transmitted to line is preset to send scrambled 1’s with
the device in NT mode or scrambled 0’s if the device is in LT
mode, and the 2B+D slots at the receive digital interface
port(s) are in the high impedance state.
BP1: Not Used
This bit is not used and should always be set to zero.
*
BP1 = 0
BP2: Activation Breakpoint
This bit is effective only in LT mode. It provides for the
start-up sequence to be either automatically controlled by
the TP3410, or for the external controller to be able to halt
the sequence at J7. The controller can complete start-up by
sending “AC” to the ACT register (X'440C). For more infor-
mation, see Section 11.0, Activation/Deactivation.
*
BP2 = 0 for Breakpoint disabled.
BP2 = 1 for Breakpoint enabled.
9.5 Configuration Register CR3: Loopbacks
Byte 2
7
6
5
4
3
2
1
0
LB1
LB2
LBD
DB1
DB2
DBD
TLB
0
*
CR3 is set to X'00 at Power-On Reset.
Line Loopbacks Select: LB1, LB2, LBD
LB1, LB2, LBD bits, when set = 1, loopback each individual
B1, B2, or D channel respectively from the line receive input
to the line transmit output. They may be set separately or to-
gether. Each loopback is operated near the Bx and Br digital
interface pins (or Dx and Dr if the D port is selected). These
loopbacks may be either transparent, that is data received
from the line is also passed on to the digital interface, or
non-transparent, in which case the selected channel bits on
the digital interface are in the high impedance state; trans-
parency is controlled by the TLB bit.
Digital Loopbacks Select: DB1, DB2, DBD
DB1, DB2 and DBD bits, when set = 1, turn each individual
B1, B2, or D channel respectively from the Bx input to the Br
output (or Dx and Dr if the D port is selected). They may be
set separately or together. Each loopback is operated near
the digital interface pins; if Format 3 is selected there is no
restriction on the time-slots selected for each direction.
These loopbacks may be either transparent, that is data re-
ceived from the Bx or Dx input is also transmitted to the line,
or non-transparent, in which case the selected channel bits
to the scrambler are forced low in LT mode or high in NT
mode; transparency is controlled by the TLB bit.
TLB: Transparent Loop-Back Enabling
*
TLB = 0 for non-transparent loopbacks (B1, B2 or D chan-
nel).
TLB = 1 for transparent loopbacks.
9.6 Configuration Register CR4: Device Control
A new configuration register (CR4) has been added to the
Rev. 3 TP3410 device to allow control of new features.
Please also see TP3410 Users Manual AN-913.
Address X'2C.
Byte 2
7
6
5
4
3
2
1
0
SH9
AACT
WS
333 Hz
saif
TFB0
RFS
LFS
*
CR4 is set to X'0F at Power-On Reset.
SH9: Software H9 Control Bit
*
SH9 = 0 (default state)
In NT mode, while SH9 = 0, a rev 3.x device in state H6, H7
or H8, H11 will enter the H9 state in response to receiving
“dea = 0” for 3 consecutive superframes and then exit after
60 ms (to prevent a “hang up condition”) to H12. With SH9 =
1, a TP3410 Rev 3.3 device in state H6, H7 or H8, H11 will
generate a DP interrupt when it receives the “dea=0” bit but
is prevented from transitioning to device state H9. The de-
vice will still deactivate in response to loss of signal. Deacti-
vating in this manner will however cause the NT mode de-
vice to perform a cold start only on subsequent activation
attempts. The WS bit may be set = 1 for the device to at-
tempt a warm start.
AACT: Activation Control Bit
*
AACT = 0 (default state)
AACT = 1 enables auto-activation in either LT or NT modes.
AACT = 0 disables it (default state) and the device behaves
normally.Auto-activation can be used in applications such as
Linecard, to allow the device to respond to an incoming 10
kHz wake-up tone (LSD) by powering itself up (PUP) and
starting the activation procedure (AR) within the device.
WS: Warm Start
*
WS = 0 (default state)
If this bit is set = 1, a Rev 3.3 device will attempt Warm Start
activation after a deactivation. This function should only be
necessary where Warm Start is preferred but SH9 = 1 is re-
quired.
333 Hz: Maintenance Test Tone
*
333 Hz = 0 (default state)
333 Hz=1 enables 333 Hz tone for Maintenance test modes
(Bellcore requirement).
333 Hz = 0 disables it. This test tone is to be used in power
up (after PUP) state but not activated.
Example of use:
Write PUP, X'2C1F to enable 333 Hz test tone, X'2C0F to
disable 333 Hz tone.
saif: Select Analog Interface
*
saif = 1 (default state)
saif = 1 indicates operation with the standard line interface
that is compatible with Rev. 2.x devices. saif = 0 indicates
use of the alternative line interface circuit with 0
on the
line-side of the transformer. This circuit can provide benefit
for linecard applications where line powering of remote NT1s
and repeaters is required.
Example of use:
Write X'2C0F for standard line interface and X'2C07 for alter-
native line interface.
19
www.national.com
PrintDate=1997/07/09 PrintTime=13:38:31 1109 ds009151 Rev. No. 1
Proof
19
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| TP3420J | ISDN Line Interface |
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相關代理商/技術參數(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)動器，接收器，收發(fā)器 系列:- 標準包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動器/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） 供應商設備封裝: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)動器，接收器，收發(fā)器 系列:- 標準包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動器/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） 供應商設備封裝: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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