Hi I have a number of queries relating to the CC2540 processor.
In the users section it states that the digital I/O on the CC2450 can be programmed for tristate, pull up or pull down. Are the resistors configured internally or are they supplied external to the device.
Does the external reset need a pull up to Vdd or can it be left floating. Is the reset internally configurable similar to PIC devices.
Battery monitoring would I be correct in my understanding that the battery can be monitored by selecting the internal ADC reference and compared with AVDD5/3 which looks as though it's not a physical input but an internal one.
And finally, can I get away with a 2 layer pcb design. If not can anyone provide an explanation of the layers.
Thanks for your patience.
John