Part Number:CC2640R2F
Hi all,
Im working on using CC2640R2F with a peripheral via SPI with logic voltage 1.7 V to 1.95 V. I may need to use a second peripheral which is at 3 V logic ( I'm trying to find the same peripheral at 1.8 Logic)
Option 1 : I'm planning to use external regulator mode with TPS62740, configuring VDDS to be at 1.8V. I'm running the system on a 3V coin cell battery.
Option 2 : I was reading through the technical manual for CC2640R2F and found out that I can configure VDDS2 to be 1.8 V and Use GPIOs( 0-6) with my peripheral at 1.8 V logic. VDDS in this case will be connected to 3.0 V. I may need to use a second peripheral that runs at 3V logic.
Which is the most efficient design with lowest power consumption as I'm designing a system for which battery life is the biggest concern. If I can find the second peripheral at 1.8 V logic, then Im planning to go ahead with external regulator mode. Please advise.