Warning!
The I/O pins are connected directly to the FPGA/SoC device. Use only VCC_IO voltages compliant
with the equipped FPGA/SoC device; any other voltage may damage the mounted Mercury FPGA/SoC
module, as well as other devices on the Mercury+ ST1 base board.
Warning!
Do not insert a PMOD module to these connectors if the corresponding VCC_IO_[x] supply is not 3.3 V,
as this may damage the mounted Mercury FPGA/SoC module, as well as other devices on the Mercury+
ST1 base board.
4.19 Battery Holder (J1600)
A 3 V lithium battery (CR1220) can be installed for buffering the real-time clock on the connected Mercury
FPGA/SoC module. The battery is not included.
Type Manufacturer
FBA75002-S02B2101L TXGA
Table 16: J1600 - Battery Holder Type
Warning!
There is a danger of explosion if the battery is replaced incorrectly - only replace the battery with the
same or equivalent type recommended by Enclustra.
Used batteries should be disposed of according to the manufacturer’s instructions.
4.20 FPGA JTAG Connector (J1502)
The FPGA JTAG connector allows accessing the JTAG port of the mounted Mercury FPGA/SoC module. The
signals on this connector are protected against ESD. Series termination resistors are equipped between the
module signals and the JTAG header.
D-0000-456-001 24 / 48 Version 02, 23.07.2020
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