User`s manual

RTD Embedded Technologies, Inc. | www.rtd.com 27 FPGA35S6 User’s Manual
6.1.19 R_DDR_STATUS (READ)
This is a status register for the DDR2 memory interface.
B0: Read error
B1: Read overflow
B2: Read empty
B3: Read full
B4: Write error
B5: Write underrun
B6: Write empty
B7: Write full
B[14:8]: Read count
B[22:16]: Write count
B[24]: Command full
B[25]: Command empty
B[31]: Calibration done