Datasheet

Section 6 Bus Controller
Rev.7.00 Dec. 24, 2008 Page 120 of 698
REJ09B0074-0700
6.3.3 Wait Control Registers H and L (WCRH, WCRL)
WCRH and WCRL select the number of program wait states for each area.
Program waits are not inserted in the case of on-chip memory or internal I/O registers except for
the on-chip USB.
• WCRH
Bit Bit Name Initial Value R/W Description
7
6
W71*
W70*
1
1
R/W
R/W
Area 7 Wait Control 1 and 0
These bits select the number of program wait states
when area 7 in external space is accessed while the
AST7 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
7 is accessed
01: 1 program wait state inserted when external space
area 7 is accessed
10: 2 program wait states inserted when external space
area 7 is accessed
11: 3 program wait states inserted when external space
area 7 is accessed
5
4
W61*
W60*
1
1
R/W
R/W
Area 6 Wait Control 1 and 0
These bits select the number of program wait states
when area 6 in external space is accessed while the
AST6 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
6 is accessed
01: 1 program wait state inserted when external space
area 6 is accessed
10: 2 program wait states inserted when external space
area 6 is accessed
11: 3 program wait states inserted when external space
area 6 is accessed
Note: * The on-chip USB and on-chip RTC are allocated to area 6 and area 7, respectively.
Therefore, these bits should be set to 0.