7512 datasheet(59/87 Pages) RENESAS

59 / 87 page

Feb 18, 2005

page 59 of 85

REJ03B0122-0101

7512 Group

Table 13 Summary of the 7512 Group (flash memory version)

FLASH MEMORY MODE

The 7512 Group (flash memory version) has flash memory that

can be rewritten with a single power source.

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

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

the flash memory can be manipulated using a programmer and

the CPU rewrite mode in which the flash memory can be manipu-

lated by the Central Processing Unit (CPU).

Summary

Table 13 lists the summary of the 7512 Group (flash memory ver-

sion).

The flash memory of the 7512 Group is divided into 4 blocks of

User ROM area and Boot ROM area as shown in Figure 68.

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 control program in a Boot mode. The user

can write a rewrite control program in this Boot ROM area that

suits the user’s application system. This Boot ROM area can be

rewritten in only parallel I/O mode.

Item

Power source voltage

Program / Erase voltage

Flash memory mode

Erase block division User ROM area

Boot ROM area

Program method

Erase method

Program/Erase control method

Number of commands

Number of program/ Block 0 to Block 3

Erase times

Block A, Block B

ROM code protection

Specifications

Vcc = 2.5V±2%

2 modes (Parallel I/O mode, CPU rewrite mode)

Refer to the Figure 68

1 block (4K bytes) (Note 1)

Byte program

Batch erasing

Program/Erase control by software command

5 commands

100 times

1K times

Available in parallel I/O mode

Note 1: This Boot ROM area can be rewritten in only parallel I/O mode.

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