r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 497

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

9. Use SDMR to issue the MRS command and reset the DLL. Also set the burst length, CAS
10. After the PREALL command is issued, use the SMS field in SCR to issue the REF command
11. Use SDMR to issue the MRS command, release the DLL reset (MA8 = low), and determine
12. After the DLL is reset, wait for 200 cycles of the memory clock: normal memory access will
Match the SDMR setting, etc. of the DDR-SDRAM with the register settings of the DDRIF.
latency, and so on.
twice.
the operating mode. In this case, use the setting for the burst length, etc. that was specified in
step 8.
then be possible.
Section 12 DDR-SDRAM Interface (DDRIF)
Rev. 1.00 Oct. 01, 2007 Page 431 of 1956
REJ09B0256-0100