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DESCRIPTION
The ST20-JPI parallel port to JTAG interface is
a host interface to allow connection from a PC
parallel port to any JTAG diagnostic controller
based ST20 development board. 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 20 way IDC JTAG connector. Once
connected, the development target can be
accessed using the MS Windows drivers
supplied with the standard ST20 toolset.
FEATURES
Desktop mounted parallel port to JTAG inter-
face
Standard 25 way D-type parallel port connec-
tion
Standard 26 way D-type differential OS-Link
port for connection to a B300.
Standard 20 way IDC cable for JTAG connec-
tion.
Plug top power supply
Supports nibble, byte and EPP mode parallel
port standards
PRODUCT INFORMATION
PC PARALLEL PORT TO JTAG INTERFACE
ST20-JPI
42 1685 00
September 1996
Contents
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1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Hardware Installation - PC ..................................................................................................................... 4
2.2
Hardware Installation - B300 ................................................................................................................. 5
2.3
Software Installation .............................................................................................................................. 5
3
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1
The ST20-JPI front panel ....................................................................................................................... 6
3.2
The ST20-JPI rear panel ....................................................................................................................... 6
3.3
Differential Link Connection ................................................................................................................... 7
3.4
JTAG Connection .................................................................................................................................. 7
3.5
TrigIn/TrigOut SMB Coaxial Connectors ............................................................................................... 8
3.6
Power Supply Connector ....................................................................................................................... 8
4
Recommended Target Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Field Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ST20-JPI
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1
Introduction
The ST20-JPI parallel port to JTAG interface is a host interface to allow connection from a PC
parallel port to any JTAG based ST20 development board. 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
JTAG connector.
Once connected, the development target can be accessed using the MS Windows
drivers supplied with the standard ST20 toolset.
ST20-JPI
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2
Installation
2.1
Hardware Installation - PC
The ST20-JPI has six connections: Parallel port; Differential OS-Link, JTAG, TrigIn, TrigOut and
Power supply. To install the hardware connecting to a PC, the following steps should be followed:
Plug the 25-way D-type of the parallel port cable built into the interface, into the parallel port
of the PC.
Plug the target development system into the 20-way IDC connector using a 20 way IDC
cable.
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 LEDs on the interface should illuminate once the software
is running. For a description of the meaning of the LEDs, see the ST20 toolset documenta-
tion.
Figure 2.1 ST20-JPI connections basic configuration
Mains PSU
Target development board
ST20-JPI
Parallel port to JTAG interface
Host
ST20
ST20-JPI
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2.2
Hardware Installation - B300
The ST20-JPI can also be attached to the Ethernet via a B300. To install the hardware connecting
to a B300, the following steps should be followed:
Connect the B300 to the ST20-JPI using a Differential OS-Link cable supplied with the
B300.
Plug the target development system into the 20-way IDC connector using a 20 way IDC
cable.
Plug power supply cable into PSU socket of the interface.
Plug the power supply into the mains socket.
Switch on the B300.
Switch on the power supply to the ST20-JPI. The LEDs on the interface should illuminate
once the software is running. For a description of the meaning of the LEDs, see the ST20
toolset documentation.
Switch on the Target power supply.
2.3
Software Installation
For installation of the DLL and VxD drivers, please refer to the ST20 Toolset software installation
documentation.
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