NetFPGA-1G-CML™ Board Reference Manual
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The Xilinx
Kintex-7 Data Sheet: DC and AC Switching Characteristics
(DS182) provides more information on the
power supply requirements of the FPGA board.
Supply
Derived From
Application
5.0 V
12.0 V
USB HID; FMC
3.3 V
12.0 V
SD Card; Ethernet PHYs; Cypress FX2LP; Microchip PIC; BPI
Flash; FPGA I/O Banks 14,15; FMC; PMODs
2.0 V
5.0 V
FPGA auxiliary supply, VCC
BAT
; Backup battery; Real-time clock
backup.
1.8 V
12.0 V
QDRII+ supply
1.8 V
3.3 V
FPGA GTX transceiver Quad PLL
1.5 V
12.0 V
DDR3; FPGA I/O Bank 34
1.2 V
12.0 V
FPGA GTX transceiver termination
1.0 V
12.0 V
FPGA GTX analog supply
1.0 V
3.3 V
FPGA Core
0.9 V
3.3 V
QDRII+ reference
0.75 V
3.3 V
DDR3 reference
VADJ
12.0 V
FPGA I/O Banks 12, 13; FMC; Configurable.
SET_VADJ2
FPGA AF20
SET_VADJ1
FPGA AF19
VADJ
0
0
1.2 V
0
1
1.8 V
1
0
2.5 V
1
1
3.3 V
Table 1. On-board power supplies.
3
Oscillators and Clocks
On-board oscillators support various board subsystems. A low-jitter 125 MHz oscillator is provided for the Ethernet
PHYs and a 50 MHz oscillator drives the FPGA master configuration clock. The Cypress FX2LF and Microchip PIC
microcontroller each contain on-chip oscillators running at 24 MHz and 8 MHz, respectively.
The main FPGA system clock is provided by an ultra-low-jitter 200 MHz differential oscillator connected to pins
AA2 and AA3 in I/O bank 34. This can drive up to ten internal PLLs (Phase Locked Loops) and MMCMs (Mixed-
Mode Clock Managers) on the FPGA for high-performance multi-clock-domain designs. Please refer to the Xilinx
7-
Series Clock Resources User Guide
(UG472) for more details on FPGA internal clocking resources.
4
FPGA Memory
The XC7K325T FPGA includes 445 on-chip Block RAMs (BRAMs) of 36Kb, or 4096 bytes with two-bit error
correction, which amounts to a total of 1.78 MB of on-chip, error-corrected static RAM that can be used for a
variety of purposes ranging from program storage for deeply embedded "bare metal" applications to data