Datasheet

Section 6 Bus Controller
Rev.6.00 Sep. 27, 2007 Page 153 of 1268
REJ09B0220-0600
WCRL
Bit : 7 6 5 4 3 2 1 0
W31 W30 W21 W20 W11 W10 W01 W00
Initial value : 1 1 1 1 1 1 1 1
R/W : R/W R/W R/W R/W R/W R/W R/W R/W
Bits 7 and 6—Area 3 Wait Control 1 and 0 (W31, W30): These bits select the number of
program wait states when area 3 in external space is accessed while the AST3 bit in ASTCR is set
to 1.
Bit 7
W31
Bit 6
W30 Description
0 0 Program wait not inserted when external space area 3 is accessed
1 1 program wait state inserted when external space area 3 is accessed
1 0 2 program wait states inserted when external space area 3 is accessed
1 3 program wait states inserted when external space area 3 is accessed
(Initial value)
Bits 5 and 4—Area 2 Wait Control 1 and 0 (W21, W20): These bits select the number of
program wait states when area 2 in external space is accessed while the AST2 bit in ASTCR is set
to 1.
Bit 5
W21
Bit 4
W20 Description
0 0 Program wait not inserted when external space area 2 is accessed
1 1 program wait state inserted when external space area 2 is accessed
1 0 2 program wait states inserted when external space area 2 is accessed
1 3 program wait states inserted when external space area 2 is accessed
(Initial value)