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Chapter 1 5
Introduction
Utilities board
The microprocessor-controlled JTAG interface captures incoming
command packets and sends out scan information packets across the
ethernet connection to the teststation. Through the teststation
connection, one can read and write every CSR in the system.
Figure 2 Utilities board
11/16/98
IOEXS118
Core logic bus Core logic bus
MIB
Hard errors and
environmental
sensors
scanning
Node
To
power
Ethernet
Utility bus
Utilities board
Led display
RS232
RS232
Ethernet
Teststation
SPACSPACSPAC SPAC SPAC SPAC SPACSPAC
logic
Clock
JTAG
controller
and interface
SPUC SMUC
Power-on
display
Liquid crystal
Core logic
power
To