ZED-F9T-Integration Manual
BBR powered. This operating mode is called Hardware Backup Mode which enables time keeping and
all relevant data to be saved to allow a hot or warm start.
4.2.3 ZED-F9T power supply
The ZED-F9T high accuracy timing receiver requires a low noise, low dropout voltage, very low source
impedance power supply of 3.3V typically. No inductors or ferrite beads should be used from LDO
to the module VCC pin. The peak currents need to be taken into account for the source supplying
the LDO for the module.
A power supply fed by 5V is shown in the figure below. This example circuit is intended only for the
module supply.
Figure 29: ZED-F9T power supply
4.3 ZED-F9T minimal design
The minimal electrical circuit for ZED-F9T operation using the UART1 interface is shown in Figure
30 below.
UBX-19005590 - R01
4 Design Page 59 of 80
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