38K2 datasheet(252/358 Pages) RENESAS

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2.14 Flash memory

Rev.2.00

Oct 15, 2006

page 103 of 112

38K2 Group

REJ09B0338-0200

APPLICATION

Fig. 2.14.1 Memory map of flash memory version for 38K2 Group

2.14 Flash memory

This paragraph explains the registers setting method and the notes related to the flash memory version.

2.14.1 Overview

The functions of the flash memory version are similar to those of the mask ROM version except that the

flash memory is built-in and some of the SFR area differ from that of the mask ROM version (refer to

“2.14.2 Memory map”).

In the flash memory version, the built-in flash memory can be programmed or erased by using the following

three modes.

• CPU rewrite mode

• Parallel I/O mode

• Standard serial I/O mode

2.14.2 Memory map

38K2 group flash memory version has 32 Kbytes of built-in flash memory.

Figure 2.14.1 shows the memory map of the flash memory version.

Internal RAM

area

(2 Kbyte)

Not used

Built-in flash memory

area

(32 Kbytes)

000016

004016

083F16

084016

0FE016

100016

FFFF16

RAM

800016

FFFF16

32 Kbytes

User ROM area

Boot ROM area

FFFF16

F00016

4 Kbytes

0FFF16

Reserved ROM area

800016

808016

SFR area

Not used

Note: Access to boot ROM area

Pararell I/O mode

CPU rewrite mode

Standard serial mode

Read/Write avilable

Read only available

38K2 Datasheet(PDF) 252 Page - Renesas Technology Corp

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