SH7616 datasheet(286/935 Pages) RENESAS

286 / 935 page

Section 7 Bus State Controller (BSC)

Rev. 2.00 Mar 09, 2006 page 260 of 906

REJ09B0292-0200

7.2.2

Bus Control Register 2 (BCR2)

Bit:

——————

A4SZ1

A4SZ0

Initial value:

00000000

R/W:

RRRRRR

R/W

Bit:

76543210

A3SZ1

A3SZ0

A2SZ1

A2SZ0

A1SZ1

A1SZ0

—

Initial value:

11111100

R/W:

R/W

Initialize BCR2 after a power-on reset and do not write to it thereafter. When writing to it, write

the same values as those the bits are initialized to. Do not access any space other than CS0 until

the register initialization ends.

The CS0 space bus size specification is set with pins MD4 and MD3. See section 3.3, CS0 Space

Bus Width of the CS0 Area, for details.

Bits 15 to 10—Reserved: These bits are always read as 0. The write value should always be 0.

Bits 9 and 8—Bus Size Specification for Area 4 (CS4) (A4SZ1, A4SZ0)

Bit 9: A4SZ1

Bit 8: A4SZ0

Description

Longword (32-bit) size

(Initial value)

Byte (8-bit) size

Word (16-bit) size

Longword (32-bit) size

Bits 7 and 6—Bus Size Specification for Area 3 (CS3) (A3SZ1, A3SZ0). Effective only when

ordinary space is set.

Bit 7: A3SZ1

Bit 6: A3SZ0

Description

Reserved (do not set)

Byte (8-bit) size

Word (16-bit) size

Longword (32-bit) size

(Initial value)

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