
Rev. 1.0, 09/01, page 239 of 904
6.14.4
%5(42
%5(42
%5(42
%5(42
Output Timing
When the BREQOE bit is set to 1 and the
%5(42
signal is output,
%5(42
may go low before
the
%$&.
signal.
This will occur if the next external access request or CBR refresh request occurs while internal bus
arbitration is in progress after the chip samples a low level of
%5(4
.
6.14.5
Notes on Usage of the Synchronous DRAM
Setting of Synchronous DRAM Interface: The DCTL pin must be fixed to 1 to enable the
synchronous DRAM interface. Do not change the DCTL pin during operation.
Connection Clock: Be sure to set the clock to be connected to the synchronous DRAM to
SDRAM
φ
.
:$,7
:$,7
:$,7
:$,7
Pin: In the continuous synchronous DRAM space, insertion of the wait state by the
:$,7
pin is disabled regardless of the setting of the WAITE bit in BCR.
Bank Control: This LSI cannot carry out the bank control of the synchronous DRAM. All banks
are selected.
Burst Access: The burst read/burst write mode of the synchronous DRAM is not supported.
When setting the mode register of the synchronous DRAM, set to the burst read/single write and
set the burst length to 1.
CAS Latency: When connecting a synchronous DRAM having CAS latency of 1, set the BE bit
to 0 in the DRAMCR.
Содержание H8S/2376 F-ZTAT
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