Renesas H8S/2378F Technical Information PDF herunterladen (Seite 11)

2.3 On-Board Programming Modes

There are three on-board programming modes: Boot mode, user program mode, and user boot mode. The on-board

programming modes are listed in

Table 2-3.

Table 2-3 On-Board Programming Modes

Item Boot Mode User Program Mode User Boot Mode

Operating mode Mode 3 Mode 4 (Expanded mode

with on-chip ROM enabled)

Mode 7 (Single-chip mode)

Mode 5

Function This mode is a program

mode that uses an on-chip

SCI interface. The user area

and user boot area can be

programmed.

This mode can

automatically adjust the bit

rate between the host and

the LSI.

All areas in the user area

and user boot area are

erased first.

The user area can be

programmed by using a

desired interface.

The user boot program of a

desired interface can be

created and the user area

can be programmed.

Control program Boot area

(On-chip boot program)

User area

(User-created user

program)

User boot area

(User-created user boot

program)

Programming/erasing

enable area

User area

User boot area

User area User area

All erasure 9 (Automatic) 9 9

Block division erasure 9*1 9 9

Program-data transfer From the host via the SCI From a desired device via

RAM

From a desired device via

RAM

Reset start On-chip boot program

storage area (Boot area)

User area User boot area*2

Transition to user program

mode

Changing mode setting and

reset

Changing the FLSHE bit

setting

Changing mode setting

and reset

Notes:

1. All-erasure is performed. After that, the specified block can be erased.

2. Firstly, the activation is made from the embedded program storage area. After the flash memory related registers are

checked, the reset vector is fetched from the user boot area.

The user boot area can be programmed or erased only in the boot mode.

The user area and user boot area are entirely erased in the boot mode. Then, the user area or user boot area can be

programmed by commands. However, the contents of the area cannot be read until the all-erasure state. You can

program the user boot area in the boot mode then program the user area is programmed in the user boot mode, or

program only the user area by not entering the user boot mode.

In the user boot mode, the boot operation via a desired interface can be performed by the mode pin setting different

from that in the user program mode.

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