HD6432670 Hitachi, HD6432670 Datasheet - Page 184

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Bit
7
6
Rev. 2.0, 04/02, page 138 of 906
Bit Name
BE
RCDM
Initial Value
0
0
R/W
R/W
R/W
Description
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
connected.
0: Full access
1: Access in fast page mode
5$6
When access to DRAM space is interrupted by
an access to normal bus space, an access to an
internal I/O register, etc., this bit selects whether
the
next DRAM access (
driven high again (
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
at that point, and
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:
access
1:
access
5$6
5$6
5$6
Down Mode
down state, the
up mode selected for DRAM space
down mode selected for DRAM space
signal is held low while waiting for the
5$6
5$6
5$6
5$6
goes high.
2(
up mode). The setting
down mode), or is
down state is cleared
signal must be