Alinx AX7202 User manual

ARTIX-7 FPGA
Development Board
AX7202
User Manual

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Version Record
Version
Date
Release By
Description
Rev 1.2
2023-02-23
Rachel Zhou
First Release

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Table of Contents
Version Record .............................................................................................2
Part 1: FPGA Development Board Introduction .......................................... 6
Part 2: AC7200 Core Board Introduction ...................................................10
Part 2.1: FPGA Chip ........................................................................... 12
Part 2.2: Active Differential Crystal .....................................................13
Part 2.3: 200Mhz Active Differential clock ..........................................14
Part 2.4: 148.5Mhz Active Differential Crystal ................................... 15
Part 2.5: DDR3 DRAM ........................................................................16
Part 2.6: QSPI Flash ...........................................................................21
Part 2.7: LED Light on Core Board .................................................... 23
Part 2.8: Reset Button ........................................................................ 24
Part 2.9: JTAG Interface .....................................................................25
Part 2.10: Power Interface on the Core Board .................................. 26
Part 2.11: Board to Board Connectors ............................................... 27
Part 2.12: Power Supply .....................................................................34
Part 2.13: Structure Diagram ..............................................................35
Part 3: Carrier Board ..................................................................................36
Part 3.1: Carrier Board Introduction ................................................... 36
Part 3.2: Gigabit Ethernet Interface ................................................... 37
Part 3.3: SFP Interface ....................................................................... 39
Part 3.4: VGA display interface .......................................................... 42
Part 3.5: USB2.0 Interface ................................................................. 44
Part 3.6: SD Card Slot ........................................................................46
Part 3.7: USB to Serial Port ................................................................48
Part 3.8: RS232 Interface ...................................................................50
Part 3.9: EEPROM 24LC04 ................................................................51
Part 3.10: Real time clock DS1302 .................................................... 52

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Part 3.11: Expansion Header ............................................................. 53
Part 3.12: JTAG Interface ...................................................................56
Part 3.13: keys ....................................................................................57
Part 3.14: LED Light ........................................................................... 58
Part 3.15: Power Supply .....................................................................59

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This ARTIX-7 FPGA development platform adopts the core board + carrier
board mode, which is convenient for users to use the core board for secondary
development.
In the design of carrier board, we have extended a wealth of interfaces for
users, such as 2 fiber interfaces, 1 Gigabit Ethernet interfaces, 1 USB2.0 , VGT
output interface, RS232 interface etc. It meets user's requirements for
high-speed data exchange, video transmission processing and industrial
control. It is a "Versatile" ARTIX-7 FPGA development platform. It provides the
possibility for high-speed video transmission, pre-validation and
post-application of network and fiber communication and data processing. This
product is very suitable for students, engineers and other groups engaged in
ARTIX-7FPGA development.

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Part 1: FPGA Development Board Introduction
The entire structure of the AX7202 FPGA development board is inherited
from our consistent core board + carrier board model. A high-speed inter-board
connector is used between the core board and the carrier board.
The core board is mainly composed of FPGA + 2 DDR3 + QSPI FLASH,
which undertakes the functions of high-speed data processing and storage of
FPGA, high-speed data reading and writing between FPGA and two DDR3s,
data bit width is 32 bits, and the bandwidth of the whole system is up to 25Gb.
/s(800M*32bit); The two DDR3 capacities are up to 8Gbit, which meets the
need for high buffers during data processing. The selected FPGA is the
XC7A200T chip of XILINX's ARTIX-7 series, in BGA 484 package. The
communication frequency between the XC7A200T and DDR3 reaches 400Mhz
and the data rate is 800Mhz, which fully meets the needs of high-speed
multi-channel data processing. In addition, the XC7A200T FPGA features four
GTP high-speed transceivers with speeds up to 6.6Gb/s per channel, making it
ideal for fiber-optic communications and PCIe data communications.
The AX7202 carrier board expands its rich peripheral interface, including 2
SFP interfaces, 1 Gigabit Ethernet interfaces, 1 USB2.0 HOST interfaces, 1
VGA output interface, 1 RS232 interface, 1 UART serial interface. 1 SD card
interface, 2-way 40-pin expansion header, some keys and RTC circuit.

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Figure 1-1-1: The Schematic Diagram of the AX7202
Through this diagram, you can see the interfaces and functions that the
AX7202 FPGA Development Board contains:
Artix-7 FPGA core board
The core board consists of XC7A200T + 8Gb DDR3 + 128Mb QSPI
FLASH. There are two high-precision Sitime LVDS differential crystals,
one at 200MHz and the other at 148.5MHz, providing stable clock input
for FPGA systems and GTP modules.
1-channel Gigabit Ethernet Interface RJ-45 interface
The Gigabit Ethernet interface chip uses Realtek's RTL8211EG
Ethernet PHY chip to provide network communication services to users.

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RTL8211EG chip supports 10/100/1000 Mbps network transmission
rate. Full duplex and adaptive
2-channel high-speed SFP Interface
The two high-speed transceivers of the GTP transceiver of ARTIX-7
FPGA are connected to the transmission and reception of two optical
modules to realize two high-speed optical fiber communication
interfaces. Each fiber optic data communication receives and transmits
at speeds up to 6.6 Gb/s.
1-channel VGA Output interface
The development board uses ADI's ADV7123 chip to achieve VGA
output, realizing 24-bit true color RGB digital signal analog conversion,
resolution up to 1080p@60Hz output.
1-channel USB2.0 Interface
USB2.0 high-speed communication between FPGA development board
and PC is realized by Cypress CY7C68013A USB2.0 controller chip;
1-channel Uart to USB interface
1 Uart to USB interface for communication with the computer for user
debugging. The serial port chip is the USB-UAR chip of Silicon Labs
CP2102GM, and the USB interface is the MINI USB interface.
1-channel RS232 interface
Uart to RS232 interface for data communication with a computer or
other settings. The RS232 conversion chip is the MAX323, and the
RS232 interface uses the standard DB9 interface.
Micro SD card slot
1-port Micro SD card holder, support SD mode and SPI mode
RTC real time clock
Onboard RTC real time clock with battery holder, battery model
CR1220
EEPROM

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Onboard an IIC interface EEPROM 24LC04
2-way 40-pin expansion port
2-way 40-pin 0.1inch spacing expansion port can be connected to
various ALINX modules (binocular camera, TFT LCD screen,
high-speed AD module, etc.). The expansion port contains 1 channel
5V power supply, 2 channel 3.3V power supply, 3 way ground, 34 IOs
port.
JTAG Interface
A 10-pin 0.1 spacing standard JTAG ports for FPGA program download
and debugging.
keys
4 keys; 1 reset key (on the core board)
LED Light
5 user LEDs (1 on the core board and 4 on the carrier board)

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Part 2: AC7200 Core Board Introduction
AC7200 (core board model, the same below) FPGA core board, it is based
on XILINX's ARTIX-7 series 200T AC7200-2FGG484I. It is a high-performance
core board with high speed, high bandwidth and high capacity. It is suitable for
high-speed data communication, video image processing, high-speed data
acquisition, etc.
This AC7200 core board uses two pieces of MICRON's
MT41J256M16HA-125 DDR3 chip, each DDR has a capacity of 4Gbit; two
DDR chips are combined into a 32-bit data bus width, and the read/write data
bandwidth between FPGA and DDR3 is up to 25Gb; such a configuration can
meet the needs of high bandwidth data processing.
The AC7200 core board expands 180 standard IO ports of 3.3V level, 15
standard IO ports of 1.5V level, and 4 pairs of GTP high speed RX/TX
differential signals. For users who need a lot of IO, this core board will be a
good choice. Moreover, the routing between the FPGA chip and the interface is
equal length and differential processing, and the core board size is only 45*55
(mm), which is very suitable for secondary development.