3 Development Board Circuit
3.4 Clock and Reset
DBUG375-1.0E
12(40)
Three NCP3170ADR2G DC-DC power supply chips are used to
generate 3.3v, 1.5v and 1.0v, and the maximum output current is 3A.
Three TPS7A7001 LDO power supply chips are used to generate 2.5v,
1.8v and 1.2v, and the maximum output current is 2A.
One TPS51200 power chip is used to generate 0.75v power for DDR3
chip.
One APW7136CCI power chip is used to generate 9.9v power for RGB
industry screen.
One RT9284A power chip is used to generate 16V, 10.4v and -7v
power for RGB industry screen.
One AAT1541A power chip is used to ge5V and -5v power for
MIPI DSI interface.
One TPS61161A power chip is used to generate 17.4v power for MIPI
DSI interface backlighting.
3.4
Clock and Reset
3.4.1
Introduction
The development board offers a 50MHz oscillator, connecting to the
global clock pins.
The reset circuit uses keys and dedicated reset chips. After power on,
the reset chip automatically generates a reset signal to reset the FPGA and
Ethernet PHY chip. 3.3V voltage is monitored in real time, and the reset
signal is generated immediately when the exception occurs. The reset
signal can also be generated via the reset key.
Figure 3-3 Connection Diagram of Clock and Reset
M19
A14
KEY
5
50MHz
Reset chip
3.3V
RST_N
CLK_G