P0489 Terasic Technologies

1 DE5a-NET www.terasic.com DDR4 April 6, 2021 User Manual Contents Chapter 1 Overview ............................................................. 5 1.1 General Description ................................................................................................... 5 1.2 Key Features ............................................................................................................. 6 1.3 Block Diagram ........................................................................................................... 7 1.4 Operating Temperature - Important .......................................................................... 11 Chapter 2 Board Components ......................................... 12 2.1 Board Overview ....................................................................................................... 12 2.2 Configuration, Status and Setup .............................................................................. 13 2.3 General User Input/Output ...................................................................................... 17 2.4 Temperature Sensor and Fan Control ...................................................................... 21 2.5 Power Monitor ......................................................................................................... 23 2.6 Clock Circuit ............................................................................................................ 24 2.7 FLASH Memory ....................................................................................................... 27 2.8 DDR4 SO-DIMM...................................................................................................... 30 2.9 QDRII+ SRAM ......................................................................................................... 42 2.10 QSPF+ Ports ......................................................................................................... 52 2.11 PCI Express .......................................................................................................... 56 2.12 RS-422 Expansion Header .................................................................................... 59 Chapter 3 System Builder ................................................ 61 3.1 Introduction ........................................................................................................... 61 3.2 General Design Flow ............................................................................................... 63 3.3 Using System Builder .............................................................................................. 64 2 DE5a-NET www.terasic.com DDR4 April 6, 2021 User Manual