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Preliminary Data Sheet

November 2000

T9000

ISDN Network Termination Node (NTN) Device

1 Description

The T9000 is an ISDN network termination node

device that is highly integrated and provides a low-

cost solution to support the following:

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General-purpose I/O (GPIO) ports with interrupt

capability for interfacing to SLICs, codecs, DTMF

decoders, and other peripheral devices.

Three low-power, general-purpose comparators.

Two 100 kHz programmable PWM outputs with an

automatic sine wave generation mode to support

ringing, pulse metering, etc.

20 kHz鈥?00 kHz programmable dc/dc converter

synchronization output.

JTAG boundary scan on all digital pins.

Power-saving mode.

鈥?In this mode, the unused interfaces of the

T9000, such as, microcontroller, PWMs, and

comparator can remain in powerdown mode,

thus resulting in significant reduction in power

consumption (see Section 20.2, Power Con-

sumption).

Packaged in a 100-pin TQFP (thin quad flat pkg).

5 V power supply.

Operating temperature range: 鈥?0 擄C to +85 擄C.

Integrated 80C32 microcontroller with the following

features:

鈥?Programmable clock rates (MHz): 15.36, 7.68,

3.84, 1.92, 0.96.

鈥?4K internal SRAM.

鈥?64K internal ROM.

鈥?Supports external ROM/RAM.

鈥?Can be disabled via pin strap (sleep mode) for

use with an external emulator.

鈥?Programmable watchdog timer.

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All standard NT1 functions required to attach an

S/T interface device to an ISDN network. In addi-

tion, the T9000 also supports attachment of two

standard analog (POTS) telephones for communi-

cations over an ISDN network.

Intelligent network termination (INT/Smart NT1)

functions, with its built-in controller and support for

attachment of two analog phones for communica-

tions over an ISDN network.

A variation of the V5.1 signaling protocol called

narrowband multiservice delivery system (NMDS)

adopted by countries using the V5 signaling proto-

col (e.g., United Kingdom)

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In addition, the T9000 can also be used for pair-gain

applications where support for more than one tele-

phone line is required without the installation of an

additional pair of wires from the telephone central

office to the customer premises.

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2 Features

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Complete interface to basic rate ISDN networks at

the S/T-interface and U-interface reference points.

U-interface (LT or NT operation) conforms to

ANSI*

T1.601 and ETSI TS 080 standards.

S/T-interface conforms to

ANSI

T1.605 standard,

ITU-T I.430 recommendation, and ETSI ETS 300

012 standard for the network termination (NT) side

of the network.

Low power consumption.

D-channel HDLC formatter with address recogni-

tion and integrated contention resolution scheme.

64-byte D-channel FIFOs.

GCI+ interface supporting GCI and generic TDM

modes for interfacing to a wide variety of POTS cir-

cuits.

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External ROM and RAM (64K x 8 maximum each)

are accessed through an external data/address bus.

Support for ROM and RAM space above the 64K

limit can be accomplished by memory paging using

one or more GPIO signals as an external chip select.

Power management routines may be implemented

through the microcontroller to power down most of

the internal submodules, including the microcontrol-

ler itself. An autosleep mode is also included, allow-

ing the microcontroller to stop its internal clock and

be automatically restarted (microcontroller wake-up)

whenever any interrupt is triggered.

*

ANSI

is a registered trademark of American National Standards

Institute, Inc.

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• 型號
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• T9000
  英文版
  ISDN Network Termination Node (NTN) Device
  AGERE
  T9000
• T9000
  英文版
  ISDN Network Termination Node (NTN) Device
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  T9000

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