YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 290

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)

CAS latency is controlled by settings of the W22 to W20 bits of WTCRB. Set the CAS latency

count, as shown in table 6.10, by the setting of synchronous DRAM. Depending on the setting, the

CAS latency control cycle (T

AST2 bit of ASTCR. Figure 6.45 shows the CAS latency control timing when synchronous

DRAM of CAS latency 3 is connected.

The initial value of W22 to W20 is H'7. Set the register according to the CAS latency of

synchronous DRAM to be connected.

Table 6.10 Setting CAS Latency

Rev.7.00 Mar. 18, 2009 page 222 of 1136

REJ09B0109-0700

CAS Latency Control

Connect synchronous DRAM of CAS

Connect synchronous DRAM of CAS

Connect synchronous DRAM of CAS

Connect synchronous DRAM of CAS

Reserved (must not used)

) is inserted. WTCRB can be set regardless of the setting of the

CAS Latency Control

Cycle Inserted