M16CSLASH1N datasheet(185/238 Pages) RENESAS

185 / 238 page

Rev.1.00

Oct 20, 2004

page 173 of 222

M16C/1N Group

19. Flash Memory Version

REJ09B0007-0100Z

Table 19.1 Outline performance of flash memory version

19. Flash Memory Version

19.1 Overview

The flash memory version has four modes—CPU rewrite, standard serial input/output (hereinafter re-

ferred to as standard serial I/O), parallel input/output (hereinafter referred to as parallel I/O), and CAN

input/output (hereinafter referred to as CAN I/O) modes—in which its internal flash memory can be oper-

ated on.

Table 19.1 shows the outline performance of flash memory version and Table 19.2 shows the outline of

flash memory rewrite mode. (see Table 1.1 Performance outline for the items not listed in Table 19.1).

Item

Flash memory operation mode

Erase block division

Program method

Erase method

Program, erase control method

Protect method

Number of commands

Program, erase

count

Block 0 to 3

Block A and B

(Data area)

ROM code protect

Performance

Four modes (CPU rewrite, parallel I/O, standard serial I/O and CAN I/O)

See Figure 19.1 Outline performance of flash memory version

In units of word, in units of byte (Note 1)

Block erase

Program and erase controlled by software command

Block 0 and 1 are protected by register rewrite (FMR02)

Block 0 to 3 are protected by register rewrite enable bit (FMR16)

5 commands

100 times

Parallel I/O, standard serial I/O and CAN I/O modes are supported

Note 1: Can be programmed in byte units in only parallel I/O mode.

Data retention

10 years

Table 19.2 Outline of flash memory rewrite mode

The user ROM area is

rewritten by executing

software

commands

from the CPU.

EW0 mode:

Can be rewritten in

any area other than

the flash memory

EW1 mode:

Can be rewritten in

the flash memory

User ROM area

Single chip mode

None

The user ROM area is

rewritten by using a

dedicated serial pro-

grammer.

Standard serial I/O mode 1:

Clock sync. serial I/O

Standard serial I/O mode 2

(Note 1): UART

User ROM area

Boot mode

Serial programmer

The user ROM area is

rewritten by using a

dedicated parallel pro-

grammer.

User ROM area,

Boot ROM area

Parallel I/O mode

Parallel programmer

The user ROM area is

rewritten by using a

dedicated CAN pro-

grammer.

User ROM area

Boot mode

CAN programmer

Function

Areas which

can be rewritten

Operation

mode

ROM

programmer

Flash memory

rewrite mode

CPU rewrite mode

Standard serial I/O

mode

Parallel I/O mode

CAN I/O mode

Note 1: When using the standard serial I/O mode 2, make sure a main clock input oscillation frequency is

set to 10 or 16 MHz.

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