ISDN Datasheet, PDF (12/14 Pages) Texas Instruments – ISDN Basic Rate Interface Software for the HPC16400E High Performance Data Communications Microcontroller

2 0 Functional Description (Continued)
signal detection signal from the SID Conditions for deter-
mining when to go in and out of idle mode are application
dependent
2 6 3 Timer Interrupt Handler
The Timer Interrupt Handler fields interrupts from two of the
HPC onboard timers Timer T0 the Watchdog Timer over-
flows every 65536 clock counts When this occurs the Timer
Interrupt Handler mails a message to start the Watchdog
Task Timer T1 the ISDN Software Timer overflows every
10 ms The ISDN Software Clock is incremented every tenth
Timer T1 overflow resulting in an ISDN Clock with 100 ms
resolution which is used by the Executive Timer facility
The Executive Interface Module is always supplied as
source code to allow modification to insert application tasks
A Multi-Tasking Executive is required to run the Basic Rate
Interface
Order Part Number Description
Multi-Tasking Executive
HPC-ISDN-EXEC-O Multi-Tasking Executive Object Code
Basic Rate Interface
HPC-ISDN-BRI-S Basic Rate Interface (Generic) Source
Code
HPC-ISDN-BRID-S Basic Rate Interface (DMS-100)
Source Code
2 6 4 Watchdog Task
HPC-ISDN-BRI5-S Basic Rate Interface (5ESS) Source
Code
A special task is performed by the HPC’s watchdog feature
to verify system sanity The Watchdog Task waits for a mail
message that is sent by the Timer Interrupt Handler when
Timer T0 overflows This operation requires that the Watch-
dog Task be regularly scheduled by the HPC Executive The
Watchdog Task is assigned the highest task priority 255
3 0 Ordering Information
3 1 LICENSE AGREEMENT
te ^{A license agreement is required for the use and sale of the}
National Semiconductor ISDN Software Contact your local
National Semiconductor field sales office for more informa-
tion or contact the factory direct at
National Semiconductor
ISDN Software Support
M S 16-174
le ^{2900 Semiconductor Drive}
Santa Clara CA 95051
[phone]
3 2 SOFTWARE ORDER INFORMATION
ISDN software is available in either Object or Source Code
format A Demonstration package is also available Manuals
o ^{are included with the Demonstration package and with the}
Executive and Basic Rate Interface Software packages
Basic Rate Interface (BRI) software is available for several
different central office switches The generic BRI includes a
generalized CCITT Switch Interface
s Each BRI Package contains the following modules
Layer 1 Driver (controls S device)
Layer 2 Driver (controls DMA HDLC)
Layer 2 Controller (Q 921)
b _{Layer 3 Controller (Q 931 Protocol Control)}
Management Entity (Q 921 and Q 931)
Call Control (Demonstration Application)
Tracer (Demonstration and Development Tool)
O ^{The Multi-Tasking Executive contains two modules}
Demonstration Package
HPC-ISDN-PCDEMO ISDN Basic Rate Interface Demon-
stration (includes Multi-Tasking Exec-
utive and Basic Rate Interface Soft-
ware Manuals)
4 0 Other Related Information
4 1 DEVICE INFORMATION
Additional technical information on devices referenced in
this datasheet is available from National
HPC16400 High Performance microController
HPC16083 High Performance microController
TP3076 COMBO II^TM
TP3420 CCITT S T Interface
4 2 DEVELOPMENT SUPPORT INFORMATION
Development tools are available for the HPC Family of Mi-
crocontrollers These tools support the ISDN development
environment ISDN software must be ordered separately
4 2 1 ISDN Demonstration Kit
A kit is available that demonstrates the software and hard-
ware discussed in this datasheet Included in this kit is a
TP3500 development board featuring the HPC16400
TP3070 COMBO II TP3420 ‘‘SID’’ and ISDN Basic Rate
Interface software in ROM A complete set of manuals are
included This demonstration kit may be ordered from Na-
tional part number
ISDN-TP3500-Kit
4 2 2 Development Systems
Several different Microcontroller-On-Line-Emulator Devel-
opment Systems are available for hardware and software
development of the HPC Family of Microcontrollers Com-
plete information on Development Systems and Accesso-
ries may be found in the Microcontroller Development Sup-
port Datasheet
Executive Core Module
Executive Interface Module
11