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August 31, 2009
Tutorial - Wireless XBee/AVR Bootloading
about 11 years ago
Great tutorial, but a quick question regarding the level shifting. I'm using a Serial Controlled Dual Motor Driver board (runs a ATMega328 at 5V) along with a XBee Explorer Regulated. So my DI/DO pins are regulated nicely, but do we need to level shift on DIO3 as well? It seems the cap generally protects it, except on toggling when it acts as a sink to allow RST to be pulled low. Is a full transistor or other level shifter needed or could we get away with a voltage divider in that case? Thanks!