HPR3V3 is an optional accessory for the PRESTO programmer. With it, you can use the PRESTO to program devices requiring 3.3V supply voltage and 3.3V logic levels (e.g., DataFlash memories) without the need for an external 3.3V power supply.
The HPR3V3 pins are unidirectional; therefore this level shifter can be used, for example, with AVR devices, SPI Flash memories, or MSP430 devices without SBW interface, but it is not intended for devices that need bidirectional pins like PIC processors or MSP430 devices with SBW interface.
Note: Never connect external voltage to the 3.3V output supply pins!
Download User's Guide (PDF file; 223KB)