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PRODUCT INFORMATION
PC PARALLEL PORT TO OS-LINK INTERFACE
ST20-PPI
42 1679 00January 1996
FEATURES
• Desktop mounted parallel port to differential
OS-Link interface
• Standard 25 way D-type parallel port connection
• Standard 26 way D-type differential OS-Link
connection
• Plug top power supply
• Supports nibble, byte and EPP mode parallel
port standards
DESCRIPTION
The ST20-PPI parallel port to OS-Link interface is
a host interface to allow connection from a PC parallel port to any OS-Link based ST20 development
board such as the ST20450-SAB. The interface
plugs into any standard PC 25 way D-type parallel
port. Supported parallel port modes are:
• Nibble mode
• Byte mode
• EPP mode
depending on which mode the host PC can support. Connection to the development target is via a
differential OS-Link connector, as used on the IMS
B300 and ST20450-Development Board. Once
connected, the development target can be accessed with the standard ST20 Toolset using the
MS Windows drivers supplied.
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1 Introduction
The ST20-PPI parallel port to OS-Link interface is a host interface to allow connection
from a PC parallel port to any OS-Link based ST20 development board such as the
ST20450-SAB. The interface plugs into any standard PC 25 way D-type parallel port.
Supported parallel port modes are:
• Nibble mode
• Byte mode
• EPP mode
depending on which mode the host PC can support. Connection to the development
target is via a differential OS-Link connector, as used on the IMS B300 and ST20450Development Board. Once connected, the development target can be accessed with
the standard ST20 Toolset using the MS Windows drivers supplied.
2 Installation
2.1 Hardware Installation
The ST20-PPI has three connections: Parallel port; Differential OS-Link and Power
supply. To install the hardware, the following steps should be followed:
• Plug the 25-way D-type of the par allel port cable built into the interf ace, into the
parallel port of the PC
• Plug the target development system into the 26-way D-type using a differential
OS-Link cable or the differential-to-single ended cable depending on the link
interface available on the target board
NOTE: To comply with EMC regulations this cable must use shielded cable
with shielded headshells at either end.
• Plug power supply cable into PSU socket of the interface
• Plug the power supply into the mains socket.
• Switch on the PC
• Switch on the power supply. The power LED on the interface should illuminate
when the power supply is switched on
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Figure 2.1 ST20-PP1 connections
2.2 Software Installation
For installation of the DLL and VxD drivers, please refer to the ST20 Toolset software
installation documentation.
ST20-PPI
Development
Target e.g.
PC
Differential
Cable
ST20450-SAB
To mains
adaptor
Parallel port
cable
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3 Connectors
3.1 Differential Link Connector
Table 3.1 26 way D-type connector
3.2 Power Supply Connector
The ST20-PPI uses a 2.5mm power connector. The voltage range is 8-13V dc.
Pin Description Pin Description
1 +notSSDownReset 14 GND
2 +notSSDownAnalyse 15 GND
3 +notSSDownError 16 GND
4 +notSSUpReset 17 GND
5 +notSSUpAnalyse 18 GND
6 +notSSUpError 19 -notSSDownReset
7 +LinkOut 20 -notSSDownAnalyse
8 +LinkIn 21 -notSSDownError
9 GND 22 -notSSUpReset
10 GND 23 -notSSUpAnalyse
11 GND 24 -notSSUpError
12 GND 25 -LinkOut
13 GND 26 -LinkIn
GND+V
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3.3 Parallel Port Connector
Table 3.2 Parallel port connector pinout
4 Field Support
SGS-THOMSON Microelectronics Limited products are supported worldwide through
Sales Offices and authorized distributors.
5 Ordering information
Table 5.1 Ordering information
Pin Description Pin Description
1 notWRITE 10 D3-D7
2 D0 11 notWAIT
3 D1 12 D2-D6
4 D2 13 D1-D5
5 D3 14 notDATA
6 D4 15 D0-D4
7 D5 16 notINIT
8 D6 17 notADDR
9 D7 18..25 Ground
Description Order Number
ST20-PPI Parallel Port to OS-Link Interface (US) ST20-PPI/110
ST20-PPI Parallel Port to OS-Link Interface (European) ST20-PPI/220
ST20-PPI Parallel Port to OS-Link Interface (UK) ST20-PPI/UK
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Information furnished is believed to be accurate and reliable. Ho wever , SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for an y infringement of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in
life support devices or systems without express written approval of SGS-THOMSON Microelectronics.
© 1996 SGS-THOMSON Microelectronics - All Rights Reserved
IMS and DS-Link are trademarks of SGS-THOMSON Microelectronics Limited.
is a registered trademark of the SGS-THOMSON Microelectronics Group.
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco -
The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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