Xilinx Jtag Over System Controller; Intel Jtag Over System Controller; Control Connector (J1101); J1100 - Fpga Jtag Connector - Enclustra Mars EB1 Base Board User Manual

Pin Number Connection
1 JTAG_TCK
2 JTAG_PRESENT#
3 JTAG_TDO
4 VCC_IO_A
5 JTAG_TMS
6 SRST#_RDY
7, 8 Not connected
9 JTAG_TDI
10 GND
Table 13: J1100 - FPGA JTAG Connector
JTAG_PRESENT# is used to determine if an external JTAG adapter is connected; the external adapter should
tie this signal to GND when the cable is plugged in.
Warning!
The JTAG pins are connected to the FPGA/SoC device via small-value series resistors. Use only VCC_IO
voltages compliant with the equipped FPGA/SoC device. Any other voltages may damage the equipped
FPGA/SoC device as well as other devices on the module or Mars EB1 base board.
The JTAG connector available on the Mars EB1 base board can be used in combination with Xilinx Platform
Cable USB or Intel USB-Blaster download cable. For Xilinx JTAG connection, the flying wire adapter must
be used. For Intel JTAG connection, the download cable can be connected directly to the on-board JTAG
connector, as the pinout matches the Intel USB-Blaster pinout.
4.15.1

Xilinx JTAG over System Controller

The system controller includes built-in Xilinx JTAG programmer functionality, making it possible to use a USB
connection for JTAG debugging. It is fully supported by the Xilinx tools.
The following steps need to be taken in order to use the Xilinx JTAG:
Set the FTDI device in Xilinx JTAG mode using the Enclustra Module Configuration Tool (MCT) [11]
Set the ScMode0 register to 0 (refer to Sections 6.3 and 6.10)
Set the USB_SEL signal so that the currently used USB connector is routed to the FTDI device (refer to
Sections 6.3 and 6.5)
4.15.2

Intel JTAG over System Controller

Currently, the built-in Intel JTAG functionality is not supported by the system controller.
4.16

Control Connector (J1101)

The control connector is used mainly for control and monitoring purposes. Many different control functions
are affected by the signals connected to this connector. Detailed information is available in Table 14.
D-0000-307-001
Series Resistor
22
1 k
100
100
100
100
22 / 39 Version 06, 22.07.2021