SH7014 Datasheet, PDF (642/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Appendix A On-Chip Supporting Module Registers
BSC
Bus Control Register 1 (BCR1)
H'FFFF8620
8/16/32
Bit
Item
15
14
13
12
11
10
9
8
Bit name
―
―
―
―
―
―
―
IOE
Initial value
0
0
0
0
0
0
0
0
R/W
R
R
R
R
R
R
R
R/W
Item
7
6
5
4
3
2
1
0
Bit name
―
―
―
―
A3SZ
A2SZ
A1SZ
A0SZ
Initial value
0
0
0
0
1
1
1
1
R/W
R
R
R
R
R/W
R/W
R/W
R/W
Bit
Name
Value
Description
8
Multiplex I/O Enable (IOE)
0 CS3 space is ordinary space
(initial value)
1 CS3 space is address/data multiplex I/O space
3
CS3 Space Size Specification
(A3SZ)
0 Byte (8-bit) size
1 Word (16-bit) size
(initial value)
2
CS2 Space Size Specification
(A2SZ)
0 Byte (8-bit) size
1 Word (16-bit) size
(initial value)
1
CS1 Space Size Specification
(A1SZ)
0 Byte (8-bit) size
1 Word (16-bit) size
(initial value)
0
CS0 Space Size Specification
0 Byte (8-bit) size
(A0SZ)
1 Word (16-bit) size
(initial value)
Note: A0SZ is effective only in on-chip ROM effective mode. In on-chip ROM ineffective mode, the CS0
space bus size is specified by the mode pin.
Rev.5.00 Sep. 27, 2007 Page 608 of 716
REJ09B0398-0500