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ARTIX-7 FPGA Development Board AX7103 User Manual
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FPGA power supply system
Artix-7 FPGA power supplies are V
CCINT
, V
CCBRAM
, V
CCAUX
, V
CCO
, V
MGTAVCC
and
V
MGTAVTT
. V
CCINT
is the FPGA core power supply pin, which needs to be connected
to 1.0V; V
CCBRAM
is the power supply pin of FPGA block RAM, connect to 1.0V;
V
CCAUX
is FPGA auxiliary power supply pin, connect 1.8V; V
CCO
is the voltage of
each BANK of FPGA, including BANK0, BANK13~16, BANK34~35. On
AC7100 FPGA core board, BANK34 and BANK35 need to be connected to
DDR3, the voltage connection of BANK is 1.5V, and the voltage of other BANK
is 3.3V. The VCCO of BANK15 and BANK16 is powered by the LDO, and can
be changed by replacing the LDO chip. VMGTAVCC is the supply voltage of
the FPGA internal GTP transceiver, connected to 1.0V; VMGTAVTT is the
termination voltage of the GTP transceiver, connected to 1.2V.
The Artix-7 FPGA system requires that the power-up sequence be
powered by VCCINT, then VCCBRAM, then VCCAUX, and finally VCCO. If
VCCINT and VCCBRAM have the same voltage, they can be powered up at
the same time. The order of power outages is reversed. The power-up
sequence of the GTP transceiver is VCCINT, then VMGTAVCC, then
VMGTAVTT. If VCCINT and VMGTAVCC have the same voltage, they can be
powered up at the same time. The power-off sequence is just the opposite of
the power-on sequence.
Part 2.3: Active Differential Crystal
The AC7100B core board is equipped with two Sitime active differential
crystals, one is 200MHz, the model is SiT9102-200.00MHz, the system main
clock for FPGA and used to generate DDR3 control clock; the other is 125MHz,
model is SiT9102 -125MHz, reference clock input for GTP transceivers.
Part 2.3.1: 200Mhz Active Differential clock
G1 in Figure 2-3-1 is the 200M active differential crystal that provides the
development board system clock source. The crystal output is connected to the