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sliceKIT hardware manual
TCK
TMS
TDI
TDO
xTAG-2
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.
The use of xSCOPE is covered in the xCONNECT Links section. The xSCOPE
xCONNECT Link can be either enabled or disabled via a switch on the xSYS adapter
board.
2.5 XS1-L16 boot
Master core boards boot from SPI flash, while slave core boards boot from xCON-
NECT link XLB from the next connected core board.
To allow re-use of the SPI boot pins (ports 1A, 1B, 1C, 1D) as signal I/O pins for
the Star slot, a latched bus switch is used which connects the xCORE SPI pins to
either the SPI Flash or to the sliceCARD slots. The switch is controlled by X0D42
and X0D43 (P8D6 and P8D7 on Tile 0 - on the Triangle slot). Once the device
has booted, X0D43 is used to enable or disable the SPI interface, X0D42 should
0
1
PLUG_00
SOCKET_10
XS1-L16
TCK
TMS
TDO
TDI
1
0
Reset
D42 = 0
D43 = X
SPI = EN
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