
Publication No. SBC330-0HH/3
Functional Description 45
5.12 JTAG
The
SBC330
provides
JTAG
boundary
scan
facilities
for
all
IEEE1149.1
and
IEEE1149.6
‐
compliant
devices.
The
devices
included
in
the
JTAG
chain
depend
on
the
settings
of
the
P12
JTAG
jumper
links.
By
means
of
QuickSwitch
multiplexers,
the
JTAG
chain
consists
of:
• The
Lattice
isp1014A
power
manager.
• The
Lattice
MachX0
2280
FPGA
and
the
Lattice
LC4064
CPLD.
• Processor
Only.
For
use
with
AC
JTAG
to
test
PCIe
port
2
to
VPX
connectors.
• All
the
JTAG
devices
including
the
processor,
but
excluding
the
power
manager
.
NOTE
(P12 Jumper (1-2) is dual function; it is also used in normal operation to distinguish between AMP
and SMP processing Modes. The default configuration has jumpers P12 (1-2) & (7-8) linked, which
defaults the processor to AMP mode operation and sets up the JTAG chain for reprogramming of
the FPGA or CPLD if required.
Table 5-14 JTAG Configuration
P12 Pins Linked
JTAG Chain
Usage
5 & 6
Lattice PWR MAN isp1014A
Programming PWR MANAGER on
virgin board
(1 & 2) & (7 & 8)
FPGA and CPLD
Programming PWR MANAGER on
virgin board
(1 & 2) & (3 & 4) & (5 & 6)
& (7 & 8)
JTAG devices apart from processor AC electrical test (processor BGA
only)
1 & 2
All JTAG devices, inc processor
Full JTAG electrical test
Any other combination
Invalid arrangement
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