R5F3640MNFB datasheet(72/398 Pages) RENESAS

72 / 398 page

REJ09B0392-0064 Rev.0.64

Oct 12, 2007

Page 51 of 373

Under development

Preliminary Specification

Specification in this preliminary version is subject to change.

M16C/64 Group

7. Processor Mode

7.3

Internal Memory

The internal RAM can be used in all processor modes. The range of the internal RAM depends on the set-

ting of the PM 13 bit in the PM1 register.

The internal ROM is used in single-chip mode and memory expansion mode. Three internal ROMs are

available: data flash, program ROM 2, and program ROM 1.

Data flash includes block A (addresses 0E000h to 0EFFFh) and block B (addresses 0F000h to 0FFFFh).

When data flash is selected by the setting of the PM10 bit in the PM1 register, both block A and block B

can be used. Table 7.4 shows Data Flash (addresses 0E000h to 0FFFFh).

Set the PRG2C0 bit in the PRG2C register to select program ROM 2. Table 7.5 shows Program ROM 2

(addresses 10000h to 13FFFh).

Do not use the last 16 bytes (addresses 13FF0h to 13FFFh) when using program ROM 2 in single-chip

mode or memory expansion mode. These bytes are assigned as the user boot code area (refer to 22.1.2

“User Boot Function”

The range of program ROM 1 depends on the setting of the PM13 bit in the PM1 register. Figure 7.4 indi-

cates the Memory Map in Single-Chip Mode.

Table 7.4

Data Flash (addresses 0E000h to 0FFFFh)

PM10 Bit in PM1 Register

Processor Modes

Single-chip mode

Unusable

Data flash

Memory expansion mode

External area

Data flash

Microprocessor mode

External area

Reserved area

Table 7.5

Program ROM 2 (addresses 10000h to 13FFFh)

PRG2C0 bit in PRG2C Register

Processor Modes

Single-chip mode

Program ROM 2

Unusable

Memory expansion mode

Program ROM 2

External area

Microprocessor mode

Reserved area

External area

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