Renesas Renasas Single-Chip Microcomputer SH7086 Informations techniques télécharger pdf (Page 5)

Flash Development Toolkit

Method for Using the User Program Mode (SH7086 Application)

1. SH7086

1.1 Flash Memory Configuration

The flash memory of the SH7086 (SH family) has two types of memory mats: a user mat (user area) and

a user boot mat (user boot area).

In addition to these, there is another area in which the flash memory write/erase control program is

stored. This area is referred to as the boot mat (boot area). In this application note, they are referred to

as the boot area, user area and user boot area, respectively.

1.2 Operation Modes

The SH7086 has 8 kinds of operation modes (modes 0–7). Which mode is selected depends on how the

FWE pin and the mode pins (MD1, MD0) are set.

Modes 0–2 are external extension modes in which external memory and peripheral devices can be

accessed.

Modes 2, 5 and 6 permit an external address space to be set up from one area to another by the bus

controller after program execution started.

Mode 3 is a single-chip startup extension mode in which the access to external memory or peripheral

device can be switched over when program execution starts.

Modes 4–7 respectively are boot mode, user boot mode and user program mode in which the flash

memory can be written to and erased.

Be sure that the FWE pin and the mode pins (MD1, MD0) do not change state while the LSI is in

operation.

For details, see the hardware manual.

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Renesas Renasas Single-Chip Microcomputer SH7086 Informations techniques Page 5