I'm going to get started on adding uPDI support to my autoprogrammer. What is a good uPDI chip to order for messing around with this? I saw the ATTINY817-XMINI-ND, but I'm not sure it has a 6 pin uPDI connector on it or if its SPI connector can be configured to be a 6 pin uPDI connector. Are there any DIP uPDI's ? Are there any flash >64K uPDIs?