3 Development Board Circuit
3.2 Download
DBUG361-1.2E
14(30)
3.2
Download
3.2.1
Overview
The development board provides an USB download interface. The
data stream file can be downloaded to the internal SRAM, or internal flash
as needed.
Note!
When downloaded to SRAM, the data stream file will be lost if the device is powered
down, and it will need to be downloaded again after power-on.
If downloaded to flash, the data stream file will not be lost if the device is powered
down.
3.2.2
USB Download Circuit
Figure3-3 Connection Diagram for FPGA USB Download
TMS_FTDI
TCK_FTDI
TDI_FTDI
TDO_FTDI
USB to JTAG
Chip
USB_D+
USB_D-
14
13
16
18
U1
U17
GW1NR-
LV9LQ144P
3.2.3
Download Flow
Please plug USB download cable into the USB interface (J6) of the
development board to download FPGA, and then open Programmer, click
SRAM mode or Embedded flash mode to download bit stream file to SRAM
or flash.
3.2.4
Pins Distribution
Table 3-3 FPGA Download Pins Distribution
Signal Name
Pin No.
BANK
Description
I/O Level
TMS_FTDI
13
3
JTAG Signal
1.8V
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