Trion T120 BGA324 Development Kit User Guide
for the LVDS transmitters and receivers. It has two sockets to connect PMOD-compatible
peripherals. Additionally, it has a 0.5 mm high-speed connector for additional I/O pins and
one 40-pin header for connecting to a Raspberry Pi computer.
The FTDI FT2232H module has two channels to support SPI (FTDI interface 0) and
JTAG (FTDI interface 1) configuration. It receives the T120 configuration bitstream
from a USB host and writes to the on-board SPI NOR flash memory. After a reset in SPI
passive mode, the FTDI controller can also write the configuration bitstream directly to the
FPGA. Additionally, it supports direct JTAG programming mode in which it writes the
configuration bitstream directly to the FPGA through the JTAG interface.
Learn more: Refer to AN 006 Configuring Trion FPGAs for more information.
The SPI NOR flash memory stores the configuration bitstream it receives from the FTDI
FT2232H module. The T120 device accesses this configuration bitstream when it is in active
configuration mode (default).
The board's main power supply is the 12 V DC input. Use the included power supply to
provide the board with power through the 12 V input jack. The recommended power input
is a 12 V (5 A minimum) DC power source.
The board regulates down the 12 V DC input using on-board switching regulators to provide
the necessary voltages for the T120 device, LPDDR3, Ethernet PHY, HDMI transmitter,
PMOD module, SPI flash memory, SDRAM and on-board oscillator.
Power On
To turn on the development board, turn on switch SW17. Upon power-up, the 12 V DC
power is input to the on-board regulators through 12 V input jack (CON1) to generate the
required 3.3 V, 2.8 V, 2.5 V, 1.8 V, 1.25 V, and 1.2 V for components on the board. When
these voltages are up and stable, on-board LEDs (D1, D2, D3, and D4) illuminate, giving you
a visual confirmation that the power supplies on the board are up and stable.
Note: The micro-USB cable cannot power the board. You must use the provided 12 V DC power supply
cable.
Reset
The T120F324I4 device is typically brought out of reset with the CRESET signal. Upon
power up, the T120F324I4 device is held in reset until CRESET toggles high-low-high.
Note: You can manually assert the high-low-high transition with pushbutton switch SW2.
CRESET has a pull-up resistor. When you press SW2, the board drives CRESET low; when
you release SW2, the board drives CRESET high. Thus, a single press of SW2 provides the
required high-low-high transition.
After toggling CRESET, the T120F324I4 device goes into configuration mode and reads
the device configuration bitstream from the flash memory. When configuration completes
successfully, the device drives the CDONE signal high. CDONE is connected to a green LED
(D6), which turns on when the T120F324I4 device enters user mode.
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