I am working on a project using an ATmega88PA, Atmel Studio 7, and Atmel JTAGICE3. I've had to deal with the learning curve of switching between ISP to program and debugWire to debug, and am wondering about the high-voltage programming mode that is all over the forums, but is not mentioned in the Atmega88PA's data sheet and has only one mention in the JTAGICE3's user guide. The web documentation for the JTAGICE3 seems to indicate that high-voltage programming is deprecated for newer AVRs, and is not possible using the JTAGICE3.
Am I correct that neither the JTAGICE3 nor newer AVRs such as the ATmega88PA support a high-voltage programming mode? Does that mean that ISP programming is always sufficient to program fuses for the ATmega88PA?