AMY-6M - Hardware Integration Manual
UBX-17021971 – R07
Design-in
Page 29 of 57
2.9
Use RESET input
AMY-6M doesn’t come with a RESET_N pin. However, a RESET_N input pin functionality can be implemented by
adding a 3k3 resistor in the line to V_RESET, which usually supervises the RF part supply, see Figure 26. Then by
driving this Reset input “low” with an open drain buffer, the system is held in a reset state.
Don’t drive this Reset input high! Only drive low or with high impedance (open drain output device).
The open drain buffer connected to the Reset input signal must be able to draw around 1mA to GND. Do not
use a higher value than 3k3 Ohm, otherwise the V_RESET threshold will be affected.
Figure 26: Reset input circuit for a single 3V power supply design
