D12320VF25V Datasheet, PDF (1022/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Appendix B Internal I/O Registers
BCRH—Bus Control Register H
H'FED4
Bus Controller
Bit
:
7
6
5
4
3
2
1
0
ICIS1 ICIS0 BRSTRM BRSTS1 BRSTS0 ⎯
⎯
⎯
Initial value :
1
1
0
1
0
0
0
0
Read/Write : R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reserved
Only 0 should be written to these bits
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 Basic bus interface
1 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.7.00 Feb. 14, 2007 page 988 of 1108
REJ09B0089-0700