Rev. 1.0, 09/01, page 124 of 904
Bit
Bit Name
Initial Value
R/W
Description
7
BE
0
R/W
Burst Access Enable
Selects enabling or disabling of burst access to
areas designated as DRAM/continuous
synchronous DRAM space. DRAM/continuous
synchronous DRAM space burst access is
performed in fast page mode. When using EDO
page mode DRAM, the
2(
signal must be
connected.
0: Full access
1: Access in fast page mode
6
RCDM
0
R/W
5$6
Down Mode
When access to DRAM space is interrupted by
an access to normal space, an access to an
internal I/O register, etc., this bit selects whether
the
5$6
signal is held low while waiting for the
next DRAM access (
5$6
down mode), or is
driven high again (
5$6
up mode). The setting
of this bit is valid only when the BE bit is set to
1.
If this bit is cleared to 0 when set to 1 in the
5$6
down state, the
5$6
down state is cleared
at that point, and
5$6
goes high.
When continuous synchronous DRAM space is
set, reading from and writing to this bit is
enabled. However, the setting does not affect
the operation.
0:
5$6
up mode selected for DRAM space
access
1:
5$6
down mode selected for DRAM space
access
Содержание H8S/2376 F-ZTAT
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