HD64F2357VF13 Datasheet, PDF (902/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

BCRH—Bus Control Register H
H'FED4
Bus Controller
Bit
:
Initial value :
Read/Write :
7
ICIS1
1
R/W
6
ICIS0
1
R/W
5
4
3
2
BRSTRM BRSTS1 BRSTS0 RMTS2
0
1
0
0
R/W R/W R/W R/W
1
RMTS1
0
R/W
0
RMTS0
0
R/W
RAM Type Select
RMTS2 RMTS1 RMTS0 Area 5 Area 4 Area 3 Area 2
000
1
10
1
Normal space
Normal space
DRAM
space
Normal
space
DRAM space
DRAM space
1 ——
—
Note: When areas selected in DRAM space
are all 8-bit space, the PF₂ pin can be
used as an I/O port, BREQO, or WAIT.
Burst Cycle Select 0
0 Max. 4 words in burst access
1 Max. 8 words in burst access
Burst Cycle Select 1
0 Burst cycle comprises 1 state
1 Burst cycle comprises 2 states
Area 0 Burst ROM Enable
0 Area 0 is basic bus interface
1 Area 0 is burst ROM interface
Idle Cycle Insert 0
0 Idle cycle not inserted in case of successive external read and external write cycles
1 Idle cycle inserted in case of successive external read and external write cycles
Idle Cycle Insert 1
0 Idle cycle not inserted in case of successive external read cycles in different areas
1 Idle cycle inserted in case of successive external read cycles in different areas
Rev.6.00 Oct.28.2004 page 872 of 1016
REJ09B0138-0600H