HD64F2149YV datasheet(731/1075 Pages) RENESAS

Nome de Peças	HD64F2149YV

Descrição Electrónicos	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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Section 22 ROM

Rev. 3.00 Jan 18, 2006 page 703 of 1044

REJ09B0280-0300

22.6

On-Board Programming Modes

When pins are set to on-board programming mode, program/erase/verify operations can be

performed on the on-chip flash memory. There are two on-board programming modes: boot mode

and user program mode. The pin settings for transition to each of these modes are shown in table

22.7. For a diagram of the transitions to the various flash memory modes, see figure 22.3.

Only advanced mode setting is possible for boot mode.

In the case of user program mode, established in advanced mode or normal mode, depending on

the setting of the MD0 pin. In normal mode, only programming of a 56-kbyte area of flash

memory is possible.

Table 22.7

Setting On-Board Programming Modes

Mode

Mode Name

CPU Operating Mode

MD1

MD0

P92

P91

P90

Boot mode

Advanced mode

User program mode

Advanced mode

———

Normal mode

———

Note:

Can be used as I/O ports after boot mode is initiated.

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