M38042F4HKP datasheet(79/116 Pages) RENESAS

79 / 116 page

Rev.1.01

Jan 25, 2005

page 79 of 114

REJ03B0131-0101Z

3804 Group (Spec. H)

Table 13 Summary of 3804 group (spec. H)

FLASH MEMORY MODE

The 3804 group (spec. H) has the flash memory that can be re-

written with a single power source.

For this flash memory, three flash memory modes are available in

which to read, program, and erase: the parallel I/O and standard

serial I/O modes in which the flash memory can be manipulated

using a programmer and the CPU rewrite mode in which the flash

memory can be manipulated by the Central Processing Unit

(CPU).

This flash memory has some blocks on it as shown in Figure 77

and each block can be erased.

In addition to the ordinary User ROM area to store the MCU op-

eration control program, the flash memory has a Boot ROM area

that is used to store a program to control rewriting in CPU rewrite

and standard serial I/O modes. This Boot ROM area has had a

standard serial I/O mode control program stored in it when

shipped from the factory. However, the user can write a rewrite

control program in this area that suits the user’s application sys-

tem. This Boot ROM area can be rewritten in only parallel I/O

mode.

q Summary

Table 13 lists the summary of the 3804 Group (spec. H).

Item

Power source voltage (Vcc)

Program/Erase VPP voltage (VPP)

Flash memory mode

Erase block division

User ROM area/Data ROM area

Boot ROM area (Note)

Program method

Erase method

Program/Erase control method

Number of commands

Number of program/Erase times

ROM code protection

Specifications

VCC = 2.7 to 5.5 V

3 modes; Parallel I/O mode, Standard serial I/O mode, CPU rewrite mode

Refer to Fig. 77.

Not divided (4K bytes)

In units of bytes

Block erase

Program/Erase control by software command

5 commands

100

Available in parallel I/O mode and standard serial I/O mode

Note: The Boot ROM area has had a standard serial I/O mode control program stored in it when shipped from the factory.

This Boot ROM area can be erased and written in only parallel I/O mode.

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