Detailed Description
Note: The System ACE controller is bypassed when the flying wire leads or the Parallel Cable IV
cable is used, causing no disruption in the JTAG chain.
The JTAG chain of the board is illustrated in Figure 1-6 (the four System ACE interface
isolation jumpers described in JTAG Isolation Jumpers are not shown). Shorting pins 1–2
on header J162 automatically bypasses the FMC modules and the GTP transceiver power
supply module in the chain.
X-Ref Target - Figure 1-6
J1
JTAG Ca b le
Connector
FPGA
U20
JTAG
BUFF/DR V R
2.5 V
3.3 V
System ACE Controller
J35
J36
P W R Mod u le
TDI
TDO
FMC1
TDI
TDO
FMC2
TDI
TDO
TDO
CFGTDI
TSTTDO
TDI
CFGTDO
TSTTDI
J162
J37
U1
U25
UG751_c1_06_041510
Figure 1-6:
JTAG Chain
PROG Push Button
[ Figure 1-2 , callout 3 ]
Pressing the PROG push button (SW5) grounds the active-Low program pin of the FPGA.
DONE LED
[ Figure 1-2 , callout 4 ]
The DONE LED (DS6) indicates the status of the DONE pin of the FPGA. When the DONE
pin is high, DS6 lights indicating the FPGA is successfully configured.
INIT LED
[ Figure 1-2 , callout 5 ]
The INIT LED (DS20) lights during FPGA initialization.
SP623 Board User Guide
UG751 (v1.1) September 15, 2010
15
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