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ZYNQ Ultr FPGA Board AXU7EV User Manual
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signal voltage is within the range accepted by the FPGA and avoid damage to
the ZYNQ Ult chip.
Figure 3-14-1: JTAG Interface Schematic
Part 3.17: Real-time Clock
The ZU7EV chip has the function of an RTC real-time clock, with timing
functions such as year, month, day, hour, minute, and second, and week.
External need to connect a 32.768KHz passive clock to provide an accurate
clock source to the internal clock circuit, so that the RTC can accurately provide
clock information. At the same time, in order for the real-time clock to operate
normally after the product is powered off, it is generally necessary to equip the
coin battery (
model LR41, voltage is 1.5V
) to supply power to the clock chip.
The BT1 on the development board is a battery Socket. After we put the coin
battery, even the system is off, the coin battery can also power the RTC system
and provide continuous time information.