SH7014 Datasheet, PDF (643/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Appendix A On-Chip Supporting Module Registers
BSC
Bus Control Register 2 (BCR2)
H'FFFF8622
8/16/32
Item
Bit name
Initial value
R/W
Item
Bit name
Initial value
R/W
15
IW31
1
R/W
7
CW3
1
R/W
14
IW30
1
R/W
6
CW2
1
R/W
13
IW21
1
R/W
5
CW1
1
R/W
Bit
12
11
IW20
IW11
1
1
R/W
R/W
4
3
CW0
SW3
1
1
R/W
R/W
10
IW10
1
R/W
2
SW2
1
R/W
9
IW01
1
R/W
1
SW1
1
R/W
8
IW00
1
R/W
0
SW0
1
R/W
Bit
15 to 8
7
6
5
4
3
Name
Idles between
Cycles (IW31,
IW30, IW21, IW20,
IW11, IW10, IW01,
IW00)
IW31,
IW30
IW21,
IW20
IW11,
IW10
IW01,
IW00
Idle Specification for
Continuous Access (CW3)
Idle Specification for
Continuous Access (CW2)
Idle Specification for
Continuous Access (CW1)
Idle Specification for
Continuous Access (CW0)
CS Assert Extension
Specification (SW3)
Value
00
1
10
1
00
1
10
1
00
1
10
1
00
1
10
1
0
1
0
1
0
1
0
1
0
1
Description
No idle cycle after accessing CS3 space
Inserts one idle cycle
Inserts two idle cycles
Inserts three idle cycles
(initial value)
No idle cycle after accessing CS2 space
Inserts one idle cycle
Inserts two idle cycles
Inserts three idle cycles
(initial value)
No idle cycle after accessing CS1 space
Inserts one idle cycle
Inserts two idle cycles
Inserts three idle cycles
(initial value)
No idle cycle after accessing CS0 space
Inserts one idle cycle
Inserts two idle cycles
Inserts three idle cycles
(initial value)
No CS3 space continuous access idle cycles
One CS3 space continuous access idle cycle (initial value)
No CS2 space continuous access idle cycles
One CS2 space continuous access idle cycle (initial value)
No CS1 space continuous access idle cycles
One CS1 space continuous access idle cycle (initial value)
No CS0 space continuous access idle cycles
One CS0 space continuous access idle cycle (initial value)
No CS3 space CS assert extension
CS3 space CS assert extension
(initial value)
Rev.5.00 Sep. 27, 2007 Page 609 of 716
REJ09B0398-0500