xCORE-Analog sliceKIT Hardware Manual
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2.1
Multiple core boards
Additional xCORE-Analog or xCORE General Purpose sliceKIT Core Boards can be
connected to the first board’s
Chain
slot via the second board’s
Square
Slot to
add extra processing capability and I/O through extra Slice Cards. The first such
board is termed the Master, the remaining boards as Slaves. When there is only
one board, it is the Master.
2.2
Setup
For debugging, an XSYS adaptor board is connected to the
Chain
Connector of the
Master Board to allow connection of an xTAG debug adapter to provide a debug
link from a USB host.
The Core Board is powered by a 12V external power supply.
2.3
Power supply
Power input to the sliceKIT Core Board is via a standard barrel jack connector. A
standard 12V external power supply should be used to power the board. Each Core
Board requires its own 12V supply. This input supply is used to generate the main
5V board supply via a DC-DC converter.
The 5V board supply is then fed to all the Slot connectors as well as powering the
Core Board itself. A 3V3 supply is generated by DC-DC converters from the 5V
main supply.
The XS1-A16 device uses integrated DC-DC converters to generate the 1V8 and
1V0 supplies required by the device.
The supplies are sequenced to ensure the power up sequence is 5V then 3V3.
When the 3V3 supply is good then the system will be released from reset.
The Core Board provides 3V3 and 5V at 0.25A each for a total of approximately 2W
per slice.
2.4
Debug
Debug of the system is via the XSYS adapter board connected to the
Chain
Connec-
tor.
The JTAG signals are connected as shown below.
Presence detect signals are present on both the
Chain
Connector and
Square
Slot
connectors to allow detection of a connected board and subsequent automatic
switching of the JTAG chain. In a system of multiple Core Boards, the Master is the
source of the JTAG chain so the system can only be debugged from the master.
Other boards will see no devices in the JTAG chain.
XM005221A
