YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 327
YR0K42378FC000BA
Manufacturer Part Number
YR0K42378FC000BA
Description
KIT EVAL FOR H8S/2378
Manufacturer
Renesas Electronics America
Series
H8®r
Type
MCUr
Datasheet
1.YR0K42378FC000BA.pdf
(1208 pages)
Specifications of YR0K42378FC000BA
Contents
Board
For Use With/related Products
H8S/2378
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 327 of 1208
- Download datasheet (8Mb)
Idle Cycle in Case of Normal Space Access after DRAM Space Access:
• Normal space access after DRAM space read access
While the DRMI bit is cleared to 0 in DRACCR, idle cycle insertion after DRAM space access
is disabled. Idle cycle insertion after DRAM space access can be enabled by setting the DRMI
bit to 1. The conditions and number of states of the idle cycle to be inserted are in accordance
with the settings of bits ICIS1, ICIS0, and IDLC in BCR are valid. Figures 6.76 and 6.77 show
examples of idle cycle operation when the DRMI bit is set to 1.
When the DRMI bit is cleared to 0, an idle cycle is not inserted after DRAM space access even
if bits ICIS1 and ICIS0 are set to 1.
UCAS, LCAS
Address bus
Data bus
(Consecutive Reads in Different Areas) (IDLC = 0, RAST = 0, CAST = 0)
RAS
Figure 6.76 Example of Idle Cycle Operation after DRAM Access
RD
φ
T
p
DRAM space read
T
r
T
c1
T
c2
Idle cycle
External address space read
T
i
T
1
Rev.7.00 Mar. 18, 2009 page 259 of 1136
T
2
T
Section 6 Bus Controller (BSC)
3
DRAM space read
T
i
T
c1
REJ09B0109-0700
T
c2
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