HD64F2636F20 Datasheet, PDF (1410/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Appendix B Internal I/O Register
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
BCRH—Bus Control Register H
H'FED4
Bit
Initial value
Read/Write
7
ICIS1
1
R/W
6
5
4
3
2
ICIS0 BRSTRM BRSTS1 BRSTS0 ⎯
1
0
1
0
0
R/W R/W R/W R/W R/W
Bus Controller
1
0
⎯
⎯
0
0
R/W R/W
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
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
Page 1360 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010