Xilinx SP701 User Manual page 20

J5
USB Conn
TMS> 19
TCK>
16
TDO>
18
TDI<
17
FT4232H
U6
J3
VREF
2
SRST
14
TMS>
4
TCK>
6
TDI> 10
TDO<
8
PC4 14pin(2X7)
FMC LPC Connector JTAG Bypass
When an FPGA mezzanine card (FMC) is attached to J21, it is automatically added to the JTAG
chain through an electronically controlled single-pole single-throw (SPST) switch, U42. The SPST
switch is normally closed and transitions to an open state when an FMC is attached. Switch U42
adds an attached FMC to the JTAG chain as determined by the FMC_PRSNT_M2C_L signal. The
attached FMC card must implement a TDI-to-TDO connection using a device or bypass jumper
to ensure that the JTAG chain connects to the U1 XC7S100 FPGA.
The U5 TXBN0304 translator between the U6 FTDI JTAG/UART interface and the J3 JTAG pod
flat cable connector J3 is normally not enabled (2-pin U5 enable header J38 jumper off) as the
USB JTAG function using USB connector J5 is typically in use. To use the J3 JTAG pod flat cable
connector, remove the J5 USB cable and install a jumper on 2-pin header J38.
UG1319 (v1.0) July 12, 2019
SP701 Board User Guide
Figure 6: SP701 JTAG Chain
PC4_JTAG_TDO
Chapter 3: Board Component Descriptions
FPGA_TMS_0
FPGA_TCK_0
FPGA_TDI_0
FPGA_TDO_0
U5
FMC_TMS_BUF
FMC_TCK_BUF
FMC_TDI_FPGA_TDO
TXB0304
U42
SW
U44
FMC_TDO
SN74AVC1T45
Send Feedback
U1
>TMS
>TCK
>TDI
<TDO
FPGA 7S100
JTAG Devices
J21
D33
>TMS
D29 >TCK
<PRSNT_L
H2
D30
>TDI
D31
<TDO
FMC LPC
X22789-042619
www.xilinx.com
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