PSB2186N-V11TR Infineon Technologies, PSB2186N-V11TR Datasheet - Page 192

• Manufacturer Part Number: PSB2186N-V11TR
• Description: IC ISDN SUBSCRIB ACCESS 44-PLCC
• Manufacturer: Infineon Technologies

Specifications of PSB2186N-V11TR

• Controller Type: Subscriber Access Controller (ISDN)
• Interface: 4-Wire SPI Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 17mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PSB2186N-V11INTR; PSB2186N-V11TR

6
The following paragraphs outline the functionality and structure of a software driver example
for the ISAC-S TE. This example is based on the Siemens Low Level Controllers (LLC’s) for
Basic Access IC which are available in C source code. The ISAC-S TE software driver will be
also referred to as LLC or ISAC-S LLC.
It should be noted that the ISAC-S LLC does not access the complete palette of device
functions but rather a subset of them. For example not all message transfer modes are
supported. Please refer to paragraph ’Architecture and Functions’ for a more detailed
description.
The ISAC-S LLC presented here has been successfully tested in the Siemens ISDN PC
development system. Correct operation with a higher layer software has been verified by using
the Siemens ISDN-Software Development and Evaluation System (SIDES) and the Siemens
ISDN-Operational Software (IOS).
The ISAC-S LLC also apply for the ISAC
There is no adaptation in the listing to this limitation.
6.1
The ISAC-S TE LLC may be divided into two major parts, one for layer 1 control, the ’SBC part’
and one for directing the HDLC-controller operations, the ’ICC part’. The naming conventions
’SBC part’ and ’ICC part’ have been introduced for two reasons: The first is that the ISAC-S TE
may be viewed as the one-chip integration of the Siemens ISDN Communications Controller,
PEB 2070 ICC, and the S-Bus Interface Circuit, PEB 2080 SBC. The second is that the SIPB-
mainboard firmware, the basis for this example software, actually uses the same code to
control either an ISAC-S TE or an ICC-SBC combination.
The ISAC-S TE LLC consists of driver functions and interrupt server. The driver functions
are implemented as a set of C functions which are responsible for interpreting hardware
related commands from the higher layers and carrying out the appropriate actions at the
hardware level. Driven by hardware interrupts, the interrupt server analyses the hardware
event and informs the higher software layers of that event.
It should be noted that this implementation has attempted to remove as many protocol specific
functions as possible from the LLC and to locate them instead in the higher layer protocol itself.
This has the advantage of making the LLC- more general and less likely to be in need of re-
programming for different protocols.
Semiconductor Group
ISAC
Architecture and Functions
®
-S TE Low Level Controller
®
-S TE with the limitation of TE functionality only.
192
Low Level Controller