M16CSLASH29 datasheet(355/499 Pages) RENESAS

355 / 499 page

20. Flash Memory Version

page 331

Table 20.2. Flash Memory Rewrite Modes Overview

Flash memory

CPU rewrite mode

Standard serial I/O

Parallel I/O mode

CAN I/O mode

rewrite mode

mode

Function

The user ROM area is

The user ROM area

The user ROM areas

The user ROM areas is

rewritten when the CPU is rewritten using a

are rewritten using a

rewritten using a

excutes software

dedicated serial

dedicated parallel

dedicated CAN pro-

command

programmer.

grammer.

from the CPU.

Standard serial I/O

EW0 mode:

mode 1:

Rewrite in area other

Clock synchronous

than flash memory

serial I/O

EW1 mode:

Standard serial I/O

Rewrite in flash

mode 2:

memory

UART

Areas which

User ROM area

can be rewritten

Operation

Single chip mode

Boot mode

Parallel I/O mode

Boot mode

mode

ROM

None

Serial programmer

Parallel programmer

CAN programmer

programmer

20.1.1 Boot Mode

The MCU enters boot mode when a hardware reset is performed while a high-level ("H") signal is applied

to pins CNVSS and P86 or while an "H" signal is applied to pins CNVSS and P16 and a low-level ("L")

signal is applied to the P85. A program in the boot ROM area is executed.

The boot ROM area is reserved. The boot ROM area stores the rewrite control program for a standard

serial I/O mode before shipping. Do not rewrite the boot ROM area.

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