PS_STATUS floating at various voltages between 0 & 1.8v

LTE Cat 1 / Cat 1 bis (Calliope)
1

I am using the Calliope2 GCo2S1 EVK with an NA2 module. Sometimes the PS_STATUS pin floats. I’m not sure how to make it happen but it seems most likely to happen upon applying power. I’ve seen it with no SIM or a Verizon SIM installed. Pushing the reset button has cleared it and also not cleared it. Issuing at^reset did not clear it. Any idea what’s going on?

ati
SEQUANS Communications
GC02S1-NA2
UE9.0.5.0

OK

2

I’m pretty sure this is due to cheap cables on my voltmeter. The connections on the banana plug end are not secure.

3

Here is a reminder of the PS_STATUS Pin behavior:

By default, the PS_STATUS pin is active high and should be connected to a 100 kΩ pull-down resistor.

  • High level: The pin is high when the module is active at the platform level (e.g., no wake source is active, such as RTS0 or any of the WAKE pins).

  • Low level: The pin is low when the module is in sleep mode or deep sleep mode.

Examples:

  • If the module is in AT+CFUN=0 or AT+CFUN=4 and no wake source is enabled, the PS_STATUS pin should be low (deep sleep mode case)

  • If the UART0 interface is open by the host and RTS0 is defined as a wake source, the PS_STATUS pin should be high (active case)