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3 Development Board Circuit
3.3 Power Supply
DBUG401-1.0E
11(22)
3.2.2
USB Download Circuit
Figure 3-1 Connection Diagram for FPGA USB Downloading
TMS
TCK
TDI
TDO
USB-to-JTAG
Chip
USB_D+
USB_D-
5
4
6
7
U1
U17
GW1NSR-
LX2CQN48PC5I4_V2.1
3.2.3
Download Flow
1.
FPGA and MCU download mode:
Plug the USB cable to the USB interface (J6) on the development
board.
Note!
Before downloading, switch the SW3, SW4, SW5, and SW6 on the development
board to the FPGA Download side.
2.
MCU download mode:
Connect the J-Link ARM emulator to the ARM JTAG interface (J8).
Note!
Before debugging, switch the SW3, SW4, SW5, and SW6 on the development board
to the ARM Download side.
3.2.4
Pinout
Table 3-1 FPGA Download and Pinout
Signal Name Pin No.
BANK
Description
I/O
TMS
4
3
JTAG Signal
3.3V (ADC/LVDS)/
1.8V (MIPI/PSRAM)
TCK
5
3
JTAG Signal
3.3V (ADC/LVDS)/
TDI
6
3
JTAG Signal
1.8V (MIPI/PSRAM)
TDO
7
3
JTAG Signal
3.3V (ADC/LVDS)/
MODE2
48
0
One Mode selection pin
1.8V (MIPI/PSRAM)
DONE
9
3
One DONE indicator
3.3V (ADC/LVDS)/
3.3
Power Supply
3.3.1
Overview
DC5V is input. The TI LDO power supply chip is used to step down
voltage from 5V to 3.3V, 2.5V, 1.8V, and 1.0V, which can meet the power
demand of the development board.