YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 278

Manufacturer Part Number

YR0K42378FC000BA

KIT EVAL FOR H8S/2378

Manufacturer

Renesas Electronics America

For Use With/related Products

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Section 6 Bus Controller (BSC)

Depending on the DRAM used, modification of the WE signal may not be permitted during the

refresh period. In this case, the CBRM bit in REFCR should be set to 1. The bus controller will

then insert refresh cycles in appropriate breaks between bus cycles. Figure 6.38 shows an example

of the timing when the CBRM bit is set to 1. In this case the CS signal is not controlled, and

retains its value prior to the start of the refresh period.

Rev.7.00 Mar. 18, 2009 page 210 of 1136

REJ09B0109-0700

(RCW1 = 0, RCW0 = 1, RLW1 = 0, RLW0 = 0)

Figure 6.37 CBR Refresh Timing