H83065 datasheet(150/963 Pages) RENESAS

150 / 963 page

Section 6 Bus Controller

Rev. 4.00 Jan 26, 2006 page 128 of 938

REJ09B0276-0400

WCRL

W11

W10

W01

W00

Initial value

Read/Write

R/W

76543210

W31

W30

W21

W20

Bit

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

Program wait not inserted when external space area 3 is accessed

1 program wait state inserted when external space area 3 is accessed

2 program wait states inserted when external space area 3 is accessed

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

Program wait not inserted when external space area 2 is accessed

1 program wait state inserted when external space area 2 is accessed

2 program wait states inserted when external space area 2 is accessed

3 program wait states inserted when external space area 2 is accessed

(Initial value)

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