HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 1137

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

BCRH—Bus Control Register H
Bit
Initial value
Read/Write
:
:
:
Idle Cycle Insert 1
0
1
ICIS1
R/W
7
1
Idle cycle not inserted in case of successive external read cycles in different areas
Idle cycle inserted in case of successive external read cycles in different areas
Idle Cycle Insert 0
0
1
ICIS0
R/W
Idle cycle not inserted in case of successive external read and external write cycles
Idle cycle inserted in case of successive external read and external write cycles
6
1
Area 0 Burst ROM Enable
0
1
BRSTRM
R/W
Basic bus interface
Burst ROM interface
5
0
Burst Cycle Select 1
0
1
BRSTS1
R/W
Burst cycle comprises 1 state
Burst cycle comprises 2 states
4
1
Burst Cycle Select 0
0
1
BRSTS0
R/W
Max. 4 words in burst access
Max. 8 words in burst access
Rev.6.00 Sep. 27, 2007 Page 1107 of 1268
3
0
H'FED4
RAM Type Select
RMTS2
Notes: 1. When areas selected in DRAM
0
1
RMTS2
R/W
RMTS1
RMTS2
2. In the H8S/2321 these bits are reserved
2
0
—
Appendix B Internal I/O Registers
0
1
0
space are all 8-bit space, the PF2
pin can be used as an I/O port,
BREQO, or WAIT. When PF2 is
used as the WAIT pin in the
H8S/2323, normal space other than
DRAM space should be designated
as 16-bit-bus space. RAS down
mode cannot be used when this
setting is made. Sample settings
are shown below.
and should only be written with 0.
RMTS1
RMTS0
0
1
—
0
1
0
1
RMTS1
RMTS0
R/W
1
0
0
1
0
1
Area 5 Area 4 Area 3 Area 2
Normal space
Area 5 Area 4 Area 3
Normal space
Normal space
(16-bit bus)
Normal space
(16-bit bus)
Normal space
RMTS0
DRAM space
REJ09B0220-0600
R/W
Normal space
DRAM space
0
0
—
(8-bit bus)
Bus Controller
DRAM space
DRAM space
(8-bit bus)
DRAM space
(8-bit bus)
Area 2
DRAM
space