I’m working with Halo V2 and I’ve got a pair of questions:
1º.- I’ve read in the “HILO V2 APPLICATION NOTE” document the two following sentences:
i) “The HiLo V2 module can be supplied by a battery or any DC/DC converter compliant with the module supply range 3.2V to 4.5V and 2.2 A.”
ii) “To start the module, first power up VBAT, which must be in the range 3.2V ~ 4.5V, and able to provide 2.2A during the TX bursts”
Then I understnad that I need a power supply of a mínimum of 2.2A. Is it ok? I ask this issue because I’ve seen a design with a linear regulator of only 1.5A/3.7V working.
2º.- The level of UART1 signals are 2.8V, and I’ve read in the “HILO V2 TECHNICAL SPECIFICATION” document that input voltage-high is a mínimum of 2.4V and Vmax in UART signals are 3.2V. Then If I need to interface this signals with a micro with 3.3V level, I’ll need a level shifter to adjust the different levels. Is it ok? I ask this issue because I’ve seen a design without these level shifter in the UART1 interface.
Thank you so much. Best regards.