H8SLASH3028F datasheet(150/923 Pages) RENESAS

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Rev. 2.00, 09/03, page 120 of 890

Bit 3—Burst Cycle Select 0 (BRSTS0): Selects the number of words that can be accessed in a

burst ROM interface burst access.

Bit 3

BRSTS0

Description

Max. 4 words in burst access (burst access on match of address bits above A3)

(Initial value)

Max. 8 words in burst access (burst access on match of address bits above A4)

Bit 2—Expansion Memory Map Control (EMC): Selects either of the two memory maps.

Bit 2

EMC

Description

Selects the memory map shown in figure 3.2: see section 3.6, Memory Map in

Each Operating Mode

Selects the memory map shown in figure 3.1: see section 3.6, Memory Map in

Each Operating Mode

(Initial value)

When EMC is cleared to 0, addresses of some internal I/O registers are moved. For details, refer

to appendix B.2, Address (when EMC = 0).

This bit is invalid in mode 6. In mode 6 and when the RDEA bit is 0, EMC must not be cleared to

Bit 1—Area Division Unit Select (RDEA): Selects the memory map area division units. This bit

is valid in modes 3, 4, and 5, and is invalid in modes 1, 2, 6, and 7.

When the EMC bit is 0, RDEA must not be cleared to 0.

Bit 1

RDEA

Description

Area divisions are as follows:

Area 0: 2 Mbytes

Area 4: 1.93 Mbytes

Area 1: 2 Mbytes

Area 5: 4 kbytes

Area 2: 8 Mbytes

Area 6: 23.75 kbytes

Area 3: 2 Mbytes

Area 7: 22 bytes

Areas 0 to 7 are the same size (2 Mbytes)

(Initial value)

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