Kent Zetterberg
Recently launched DDR4 devices have what memory device vendors may refer to as a โboundary scanโ test mode. Even though thereโs not really a boundary-scan function involved on the DDR4 side, this mode actually has been, as claimed by JEDEC, โdesigned to work seamlessly with any boundary-scan devices.โ Hereโs a brief introduction to what it does and how to test it with a boundary-scan (JTAG) tool.