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Preliminary
5. Front Panel Configuration
The front panel conforms to IEEE 1101.1 and 1101.10. This provides for EMC compatibility and
mechanical insertion and extraction. The layout in terms of JTAG and communication port layout is as
shown below.
The layout of the front panel connections is organised to match the communications port of a Texas C40
processor. The left side ports, 0-2, are Reset To Out (RTO) ports by default and represent a similarly
numbered port within the SMT327. The right side ports, 3-5, are Reset To In (RTI).
IMPORTANT. In all system configurations, RTO ports should only be connected to RTI ports. This applies
to internal flat cable connections as well as buffered port connections. Because of the high current drivers
used in the buffered ports, protection is built in and will cause the drivers to switch off if like ports are
connected together.
In systems with buffered communication port connections between SMT327 boards it is necessary to
connect the JTAG ports. In this case, a 20 way cable between a JTAG-IN and a JTAG-OUT is required.
The SMT327 board designated as "ROOT" for 3L server purposes should also be the JTAG master with no
connection to its JTAG-IN port.
Document Name:
User Guide
Product Name:
SMT327
Author:
Bill Blyth
SMT327
0
3
JTAG
O
I
U
N
T
1
4
2
5
Figure 3 Front Panel
Issue : 01
Revision Date:
Original Date:
Rev 02
8 August, 2000
30 April 1998
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